I turned on my Pamasonic TX-L26X 10B TV last night and, as often
happens, it reported that new stations had been found. I usually press
Exit at this stage in order to watch the existing channels but, for some
reason, I pressed OK to add the new stations.

This seemed to invoke an automatic tuning operation, where it went
through all the channels starting at 21, and listing what it had found.
All the muxes here are in the 20s and 30s. After 37 it scanned more
radidly until it got to 68. Then the screen went blank, and the green
status light under the screen was flashing quite fast.

After quite a while, I turned it off at the mains and started again -
but still nothing. It just sits there with a blank screen and no sound.
There's an occasional click from an internal relay and a slightly less
dark flash on the screen.

It doesn't respond to any buttons on the remote. I can't get a menu - so
I can't reset it to factory conditions, which is perhaps what it needs.

Anyone got any ideas - other than a trip to the tip?
--
Cheers,
Roger
____________
Please reply to Newsgroup. Whilst email address is valid, it is seldom
checked.

On 08/08/2021 08:23, Roger Mills wrote:
> I turned on my Pamasonic TX-L26X 10B TV last night and, as often
> happens, it reported that new stations had been found. I usually press
> Exit at this stage in order to watch the existing channels but, for some
> reason, I pressed OK to add the new stations.
>
> This seemed to invoke an automatic tuning operation, where it went
> through all the channels starting at 21, and listing what it had found.
> All the muxes here are in the 20s and 30s. After 37 it scanned more
> radidly until it got to 68. Then the screen went blank, and the green
> status light under the screen was flashing quite fast.
>
> After quite a while, I turned it off at the mains and started again -
> but still nothing. It just sits there with a blank screen and no sound.
> There's an occasional click from an internal relay and a slightly less
> dark flash on the screen.
>
> It doesn't respond to any buttons on the remote. I can't get a menu - so
> I can't reset it to factory conditions, which is perhaps what it needs.
>
> Anyone got any ideas - other than a trip to the tip?

Depends on how much you want to bother with a 10+ years old TV. You
could open it up and have a look at the power supply, and perhaps check
for bulging capacitors (not usually a problem with Panasonic). But it it
isn't something simple and obviously fixable. It looks like a trip to
the tip is on the cards.

--

Jeff

On 08/08/2021 08:43, Jeff Layman wrote:
> On 08/08/2021 08:23, Roger Mills wrote:
>> I turned on my Pamasonic TX-L26X 10B TV last night and, as often
>> happens, it reported that new stations had been found. I usually press
>> Exit at this stage in order to watch the existing channels but, for some
>> reason, I pressed OK to add the new stations.
>>
>> This seemed to invoke an automatic tuning operation, where it went
>> through all the channels starting at 21, and listing what it had found.
>> All the muxes here are in the 20s and 30s. After 37 it scanned more
>> radidly until it got to 68. Then the screen went blank, and the green
>> status light under the screen was flashing quite fast.
>>
>> After quite a while, I turned it off at the mains and started again -
>> but still nothing. It just sits there with a blank screen and no sound.
>> There's an occasional click from an internal relay and a slightly less
>> dark flash on the screen.
>>
>> It doesn't respond to any buttons on the remote. I can't get a menu - so
>> I can't reset it to factory conditions, which is perhaps what it needs.
>>
>> Anyone got any ideas - other than a trip to the tip?
>
> Depends on how much you want to bother with a 10+ years old TV. You
> could open it up and have a look at the power supply, and perhaps check
> for bulging capacitors (not usually a problem with Panasonic). But it it
> isn't something simple and obviously fixable. It looks like a trip to
> the tip is on the cards.
>

You're probably right! But why would a re-tune have caused this?

--
Cheers,
Roger
____________
Please reply to Newsgroup. Whilst email address is valid, it is seldom
checked.

On 08/08/2021 08:57, Roger Mills wrote:
> On 08/08/2021 08:43, Jeff Layman wrote:
>> On 08/08/2021 08:23, Roger Mills wrote:
>>> I turned on my Pamasonic TX-L26X 10B TV last night and, as often
>>> happens, it reported that new stations had been found. I usually press
>>> Exit at this stage in order to watch the existing channels but, for some
>>> reason, I pressed OK to add the new stations.
>>>
>>> This seemed to invoke an automatic tuning operation, where it went
>>> through all the channels starting at 21, and listing what it had found.
>>> All the muxes here are in the 20s and 30s. After 37 it scanned more
>>> radidly until it got to 68. Then the screen went blank, and the green
>>> status light under the screen was flashing quite fast.
>>>
>>> After quite a while, I turned it off at the mains and started again -
>>> but still nothing. It just sits there with a blank screen and no sound.
>>> There's an occasional click from an internal relay and a slightly less
>>> dark flash on the screen.
>>>
>>> It doesn't respond to any buttons on the remote. I can't get a menu - so
>>> I can't reset it to factory conditions, which is perhaps what it needs.
>>>
>>> Anyone got any ideas - other than a trip to the tip?
>>
>> Depends on how much you want to bother with a 10+ years old TV. You
>> could open it up and have a look at the power supply, and perhaps check
>> for bulging capacitors (not usually a problem with Panasonic). But it it
>> isn't something simple and obviously fixable. It looks like a trip to
>> the tip is on the cards.
>>
>
> You're probably right! But why would a re-tune have caused this?

It was probably coincidence. Or the power supply chip was on its last
legs, and the stress caused by a retune rewriting the new station
arrangement to memory pushed it over the edge.

--

Jeff

I don't know that vintage, is this the one with a sat tuner as well?
Does any specialist forums exist for tvs? Back in the days of paper mags,
Television magazine used to have a lot of things about weird faults and how
to fix them, Normally as sets got more modern such fixes were more hold this
down for x seconds then tap this key on the remote then etc etc type things
as bugs always seem to exist in software.

Brian

--

This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...
briang1@blueyonder.co.uk
Blind user, so no pictures please
Note this Signature is meaningless.!
"Roger Mills" <watt.tyler@gmail.com> wrote in message
news:in9h3lFsu80U1@mid.individual.net...
> On 08/08/2021 08:43, Jeff Layman wrote:
>> On 08/08/2021 08:23, Roger Mills wrote:
>>> I turned on my Pamasonic TX-L26X 10B TV last night and, as often
>>> happens, it reported that new stations had been found. I usually press
>>> Exit at this stage in order to watch the existing channels but, for some
>>> reason, I pressed OK to add the new stations.
>>>
>>> This seemed to invoke an automatic tuning operation, where it went
>>> through all the channels starting at 21, and listing what it had found.
>>> All the muxes here are in the 20s and 30s. After 37 it scanned more
>>> radidly until it got to 68. Then the screen went blank, and the green
>>> status light under the screen was flashing quite fast.
>>>
>>> After quite a while, I turned it off at the mains and started again -
>>> but still nothing. It just sits there with a blank screen and no sound.
>>> There's an occasional click from an internal relay and a slightly less
>>> dark flash on the screen.
>>>
>>> It doesn't respond to any buttons on the remote. I can't get a menu - so
>>> I can't reset it to factory conditions, which is perhaps what it needs.
>>>
>>> Anyone got any ideas - other than a trip to the tip?
>>
>> Depends on how much you want to bother with a 10+ years old TV. You could
>> open it up and have a look at the power supply, and perhaps check for
>> bulging capacitors (not usually a problem with Panasonic). But it it
>> isn't something simple and obviously fixable. It looks like a trip to the
>> tip is on the cards.
>>
>
> You're probably right! But why would a re-tune have caused this?
>
> --
> Cheers,
> Roger
> ____________
> Please reply to Newsgroup. Whilst email address is valid, it is seldom
> checked.

On 08/08/2021 08:23, Roger Mills wrote:

> Anyone got any ideas - other than a trip to the tip?

Turn it off at the mains switch for more than a couple of minutes before
switching back on. The time will give all the internal power supplies a
chance to fully discharge.

--
mailto : news {at} admac {dot} myzen {dot} co {dot} uk

In message <in9f36FsivsU1@mid.individual.net>, Roger Mills
<watt.tyler@gmail.com> writes
>I turned on my Pamasonic TX-L26X 10B TV last night and, as often
>happens, it reported that new stations had been found. I usually press
>Exit at this stage in order to watch the existing channels but, for
>some reason, I pressed OK to add the new stations.
>
>This seemed to invoke an automatic tuning operation, where it went
>through all the channels starting at 21, and listing what it had found.
>All the muxes here are in the 20s and 30s. After 37 it scanned more
>radidly until it got to 68. Then the screen went blank, and the green
>status light under the screen was flashing quite fast.
>
>After quite a while, I turned it off at the mains and started again -
>but still nothing. It just sits there with a blank screen and no sound.
>There's an occasional click from an internal relay and a slightly less
>dark flash on the screen.
>
>It doesn't respond to any buttons on the remote. I can't get a menu -
>so I can't reset it to factory conditions, which is perhaps what it
>needs.
>
>Anyone got any ideas - other than a trip to the tip?

Do you have a user guide? If so, does it have anything helpful? Might
there perhaps be a button hidden away somewhere on the set for resetting
it to factory conditions?

You could try a web search to see if anyone else has had this problem
and resolved it. There might even be a technical manual available on
Pansonic's site which might help.
--
John Hall "Hard work often pays off after time, but laziness always
pays off now." Anon

John Hall wrote:

> Might there perhaps be a button hidden away somewhere on the set for
> resetting it to factory conditions?

This is for another Panasonic, but might be worth a try

<https://www.hardreset.info/devices/panasonic/panasonic-tx-50cx680/hardreset-second-method/>

Or a different method using buttons on the TV instead of remote

<https://factory-reset.com/wiki/Panasonic_TV_Factory_Reset>

probably worth searching for other panasonic combinations, before taking
it to the skip.

Roger Mills wrote:
> I turned on my Pamasonic TX-L26X 10B TV last night and, as often
> happens, it reported that new stations had been found. I usually press
> Exit at this stage in order to watch the existing channels but, for some
> reason, I pressed OK to add the new stations.
>
> This seemed to invoke an automatic tuning operation, where it went
> through all the channels starting at 21, and listing what it had found.
> All the muxes here are in the 20s and 30s. After 37 it scanned more
> radidly until it got to 68. Then the screen went blank, and the green
> status light under the screen was flashing quite fast.
>
> After quite a while, I turned it off at the mains and started again -
> but still nothing. It just sits there with a blank screen and no sound.
> There's an occasional click from an internal relay and a slightly less
> dark flash on the screen.
>
> It doesn't respond to any buttons on the remote. I can't get a menu - so
> I can't reset it to factory conditions, which is perhaps what it needs.
>
> Anyone got any ideas - other than a trip to the tip?

The manual says there are six buttons on the side.

F Volume/Contrast/Brightness/Colour/Sharpness
Tint(NTSCmode)/Bass/Treble/Balance/AutoSetup (page 35)

+/^ Up/down controls for things that
-/v need a slider adjustment

TV \__ Input mode selection
AV /

Power

It's probably not the TV/AV selection, because if there
was no signal on the AV inputs, the OSD would say "No signal"
rather than just bobbling along with various shades of black.

Firmware is loadable via SD, but you'd most likely need
menu sanity for that to kick off.

https://av.jpn.support.panasonic.com/support/global/cs/tv/download/fw/europe/down_eux21.html

"Model Number

LCD model ... TX-L26X10B ...

Update Version Ver. 1.014
Update File Name / Size

P091_1014.zip / 7,535,616 bytes <== "SDDL.SEC" file inside

Update Date Aug 31, 2012"

PDF manual download, is just below the page image.

https://manuall.co.uk/panasonic-tx-l26x10b-viera-lcd-television/

Apparently, if you start the AutoSetup, you're supposed to be
able to stop it, then manually program channels. But that was some
other UK website that had the info.

Summary: I would fiddle with those side buttons, just to get a
menu on it. I don't really know what the best operation to
try on it would be, after that. If you get the menu to
appear, a visual check of the PSU board would not hurt.

Paul

Roger Mills wrote:

> You're probably right! But why would a re-tune have caused this?

Maybe storing the new channels to FLASH memory was the final write that
wore the chip out?

In uk.d-i-y Paul <nospam@needed.invalid> wrote:
> Summary: I would fiddle with those side buttons, just to get a
> menu on it. I don't really know what the best operation to
> try on it would be, after that. If you get the menu to
> appear, a visual check of the PSU board would not hurt.

I'd also try plugging in an HDMI source (eg DVD player) and seeing if it
manages to detect that. That'll allow you to check three things:

- whether it's working enough to detect and display the external source
- possibly wake it up enough to access the menus from where you can select a
factory reset
- whether a fallback plan of using an external STB / PVR / streaming stick
would be feasible if you don't find a way to reset the tuner

Theo

On 08/08/2021 09:38, alan_m wrote:
> On 08/08/2021 08:23, Roger Mills wrote:
>
>> Anyone got any ideas - other than a trip to the tip?
>
> Turn it off at the mains switch for more than a couple of minutes before
> switching back on.  The time will give all the internal power supplies a
> chance to fully discharge.

+1, disconnect it from the mains completely for as much as 24hrs or so
before trying again.

--

Fake news kills!

I may be contacted via the contact address given on my website:
www.macfh.co.uk

On 08/08/2021 10:19, Andy Burns wrote:
> Roger Mills wrote:
>
>> You're probably right! But why would a re-tune have caused this?
>
> Maybe storing the new channels to FLASH memory was the final write that
> wore the chip out?

It may have used the microcontroller's own flash memory. I might wonder
if some corruption during the write process caused this.

Some TVs are on eBay for parts. They don't go for a lot with a cracked
screen if you are willing to swap parts.

Otherwise it's either tip or even eBay?

On 08/08/2021 09:38, alan_m wrote:
> On 08/08/2021 08:23, Roger Mills wrote:
>
>> Anyone got any ideas - other than a trip to the tip?
>
> Turn it off at the mains switch for more than a couple of minutes before
> switching back on.  The time will give all the internal power supplies a
> chance to fully discharge.
>
>

I turned it off for several hours when transporting it from A to B.
Still no joy!
--
Cheers,
Roger

On 08/08/2021 09:44, John Hall wrote:
> In message <in9f36FsivsU1@mid.individual.net>, Roger Mills
> <watt.tyler@gmail.com> writes
>> I turned on my Pamasonic TX-L26X 10B TV last night and, as often
>> happens, it reported that new stations had been found. I usually press
>> Exit at this stage in order to watch the existing channels but, for
>> some reason, I pressed OK to add the new stations.
>>
>> This seemed to invoke an automatic tuning operation, where it went
>> through all the channels starting at 21, and listing what it had
>> found. All the muxes here are in the 20s and 30s. After 37 it scanned
>> more radidly until it got to 68. Then the screen went blank, and the
>> green status light under the screen was flashing quite fast.
>>
>> After quite a while, I turned it off at the mains and started again -
>> but still nothing. It just sits there with a blank screen and no
>> sound. There's an occasional click from an internal relay and a
>> slightly less dark flash on the screen.
>>
>> It doesn't respond to any buttons on the remote. I can't get a menu -
>> so I can't reset it to factory conditions, which is perhaps what it
>> needs.
>>
>> Anyone got any ideas - other than a trip to the tip?
>
> Do you have a user guide? If so, does it have anything helpful? Might
> there perhaps be a button hidden away somewhere on the set for resetting
> it to factory conditions?
>
> You could try a web search to see if anyone else has had this problem
> and resolved it. There might even be a technical manual available on
> Pansonic's site which might help.

I have a user guide (but not a repair manual). The only thing I can find
is via the menu - but I can't display the menu!
--
Cheers,
Roger

On 08/08/2021 10:15, Andy Burns wrote:
> John Hall wrote:
>
>> Might there perhaps be a button hidden away somewhere on the set for
>> resetting it to factory conditions?
>
> This is for another Panasonic, but might be worth a try
>
> <https://www.hardreset.info/devices/panasonic/panasonic-tx-50cx680/hardreset-second-method/>
>
>
> Or a different method using buttons on the TV instead of remote
>
> <https://factory-reset.com/wiki/Panasonic_TV_Factory_Reset>
>
> probably worth searching for other panasonic combinations, before taking
> it to the skip.

Thanks. I've tried all the button combinations in these and similar
articles - but no joy so far.
--
Cheers,
Roger

On 08/08/2021 21:33, Roger Mills wrote:
> On 08/08/2021 09:44, John Hall wrote:
>> In message <in9f36FsivsU1@mid.individual.net>, Roger Mills
>> <watt.tyler@gmail.com> writes
>>> I turned on my Pamasonic TX-L26X 10B TV last night and, as often
>>> happens, it reported that new stations had been found. I usually
>>> press Exit at this stage in order to watch the existing channels but,
>>> for some reason, I pressed OK to add the new stations.
>>>
>>> This seemed to invoke an automatic tuning operation, where it went
>>> through all the channels starting at 21, and listing what it had
>>> found. All the muxes here are in the 20s and 30s. After 37 it scanned
>>> more radidly until it got to 68. Then the screen went blank, and the
>>> green status light under the screen was flashing quite fast.
>>>
>>> After quite a while, I turned it off at the mains and started again -
>>> but still nothing. It just sits there with a blank screen and no
>>> sound. There's an occasional click from an internal relay and a
>>> slightly less dark flash on the screen.
>>>
>>> It doesn't respond to any buttons on the remote. I can't get a menu -
>>> so I can't reset it to factory conditions, which is perhaps what it
>>> needs.
>>>
>>> Anyone got any ideas - other than a trip to the tip?
>>
>> Do you have a user guide? If so, does it have anything helpful? Might
>> there perhaps be a button hidden away somewhere on the set for
>> resetting it to factory conditions?
>>
>> You could try a web search to see if anyone else has had this problem
>> and resolved it. There might even be a technical manual available on
>> Pansonic's site which might help.
>
> I have a user guide (but not a repair manual). The only thing I can find
> is via the menu - but I can't display the menu!

What you describe sounds like:

PSU dried out Capacitors
Back light failure
Backlight protection circuit has kicked in.

S.

On 08/08/2021 10:16, Paul wrote:
> Roger Mills wrote:
>> I turned on my Pamasonic TX-L26X 10B TV last night and, as often
>> happens, it reported that new stations had been found. I usually press
>> Exit at this stage in order to watch the existing channels but, for
>> some reason, I pressed OK to add the new stations.
>>
>> This seemed to invoke an automatic tuning operation, where it went
>> through all the channels starting at 21, and listing what it had
>> found. All the muxes here are in the 20s and 30s. After 37 it scanned
>> more radidly until it got to 68. Then the screen went blank, and the
>> green status light under the screen was flashing quite fast.
>>
>> After quite a while, I turned it off at the mains and started again -
>> but still nothing. It just sits there with a blank screen and no
>> sound. There's an occasional click from an internal relay and a
>> slightly less dark flash on the screen.
>>
>> It doesn't respond to any buttons on the remote. I can't get a menu -
>> so I can't reset it to factory conditions, which is perhaps what it
>> needs.
>>
>> Anyone got any ideas - other than a trip to the tip?
>
> The manual says there are six buttons on the side.
>
>    F     Volume/Contrast/Brightness/Colour/Sharpness
>          Tint(NTSCmode)/Bass/Treble/Balance/AutoSetup (page 35)
>
>    +/^   Up/down controls for things that
>    -/v   need a slider adjustment
>
>    TV \__ Input mode selection
>    AV /
>
>    Power
>
> It's probably not the TV/AV selection, because if there
> was no signal on the AV inputs, the OSD would say "No signal"
> rather than just bobbling along with various shades of black.
>
> Firmware is loadable via SD, but you'd most likely need
> menu sanity for that to kick off.
>
> https://av.jpn.support.panasonic.com/support/global/cs/tv/download/fw/europe/down_eux21.html
>
>
>     "Model Number
>
>      LCD model    ... TX-L26X10B ...
>
>      Update Version   Ver. 1.014
>      Update File Name / Size
>
>      P091_1014.zip / 7,535,616 bytes  <== "SDDL.SEC" file inside
>
>      Update Date   Aug 31, 2012"
>
> PDF manual download, is just below the page image.
>
> https://manuall.co.uk/panasonic-tx-l26x10b-viera-lcd-television/
>
> Apparently, if you start the AutoSetup, you're supposed to be
> able to stop it, then manually program channels. But that was some
> other UK website that had the info.
>
> Summary: I would fiddle with those side buttons, just to get a
>          menu on it. I don't really know what the best operation to
>          try on it would be, after that. If you get the menu to
>          appear, a visual check of the PSU board would not hurt.
>
>    Paul

Thanks. I'd *love* to get a menu on it, but it won't display *anything*!

I've got the printed manual but, as far as I can see, you need the OSD
in order to apply a firmware update.
--
Cheers,
Roger

On 08/08/2021 12:23, Theo wrote:
> In uk.d-i-y Paul <nospam@needed.invalid> wrote:
>> Summary: I would fiddle with those side buttons, just to get a
>> menu on it. I don't really know what the best operation to
>> try on it would be, after that. If you get the menu to
>> appear, a visual check of the PSU board would not hurt.
>
> I'd also try plugging in an HDMI source (eg DVD player) and seeing if it
> manages to detect that. That'll allow you to check three things:
>
> - whether it's working enough to detect and display the external source
> - possibly wake it up enough to access the menus from where you can select a
> factory reset
> - whether a fallback plan of using an external STB / PVR / streaming stick
> would be feasible if you don't find a way to reset the tuner
>
> Theo
>

I've had an Amazon fire stick connected, but it can't see that. I think
it's more than the tuner because it won't display *anything* - no menu,
no OSD.
--
Cheers,
Roger

On 08/08/2021 12:58, Java Jive wrote:
> On 08/08/2021 09:38, alan_m wrote:
>> On 08/08/2021 08:23, Roger Mills wrote:
>>
>>> Anyone got any ideas - other than a trip to the tip?
>>
>> Turn it off at the mains switch for more than a couple of minutes
>> before switching back on.  The time will give all the internal power
>> supplies a chance to fully discharge.
>
> +1, disconnect it from the mains completely for as much as 24hrs or so
> before trying again.
>

Well yes, there's no harm in doing that. Powering it down for several
hours didn't do anything though. Even longer just *might* I suppose.
--
Cheers,
Roger

On 08/08/2021 21:55, Roger Mills wrote:
> On 08/08/2021 10:16, Paul wrote:
>> Roger Mills wrote:
>>> I turned on my Pamasonic TX-L26X 10B TV last night and, as often
>>> happens, it reported that new stations had been found. I usually
>>> press Exit at this stage in order to watch the existing channels but,
>>> for some reason, I pressed OK to add the new stations.
>>>
>>> This seemed to invoke an automatic tuning operation, where it went
>>> through all the channels starting at 21, and listing what it had
>>> found. All the muxes here are in the 20s and 30s. After 37 it scanned
>>> more radidly until it got to 68. Then the screen went blank, and the
>>> green status light under the screen was flashing quite fast.
>>>
>>> After quite a while, I turned it off at the mains and started again -
>>> but still nothing. It just sits there with a blank screen and no
>>> sound. There's an occasional click from an internal relay and a
>>> slightly less dark flash on the screen.
>>>
>>> It doesn't respond to any buttons on the remote. I can't get a menu -
>>> so I can't reset it to factory conditions, which is perhaps what it
>>> needs.
>>>
>>> Anyone got any ideas - other than a trip to the tip?
>>
>> The manual says there are six buttons on the side.
>>
>>     F     Volume/Contrast/Brightness/Colour/Sharpness
>>           Tint(NTSCmode)/Bass/Treble/Balance/AutoSetup (page 35)
>>
>>     +/^   Up/down controls for things that
>>     -/v   need a slider adjustment
>>
>>     TV \__ Input mode selection
>>     AV /
>>
>>     Power
>>
>> It's probably not the TV/AV selection, because if there
>> was no signal on the AV inputs, the OSD would say "No signal"
>> rather than just bobbling along with various shades of black.
>>
>> Firmware is loadable via SD, but you'd most likely need
>> menu sanity for that to kick off.
>>
>> https://av.jpn.support.panasonic.com/support/global/cs/tv/download/fw/europe/down_eux21.html
>>
>>
>>      "Model Number
>>
>>       LCD model    ... TX-L26X10B ...
>>
>>       Update Version   Ver. 1.014
>>       Update File Name / Size
>>
>>       P091_1014.zip / 7,535,616 bytes  <== "SDDL.SEC" file inside
>>
>>       Update Date   Aug 31, 2012"
>>
>> PDF manual download, is just below the page image.
>>
>> https://manuall.co.uk/panasonic-tx-l26x10b-viera-lcd-television/
>>
>> Apparently, if you start the AutoSetup, you're supposed to be
>> able to stop it, then manually program channels. But that was some
>> other UK website that had the info.
>>
>> Summary: I would fiddle with those side buttons, just to get a
>>           menu on it. I don't really know what the best operation to
>>           try on it would be, after that. If you get the menu to
>>           appear, a visual check of the PSU board would not hurt.
>>
>>     Paul
>
> Thanks. I'd *love* to get a menu on it, but it won't display *anything*!
>
> I've got the printed manual but, as far as I can see, you need the OSD
> in order to apply a firmware update.

First, check the aerial cable works OK with another TV.

Disconnect everything from the failed TV apart from the mains lead and
the aerial cable which should go directly to it and not loop through
anything else like a video recorder.

With the TV turned on, are there any visible lights to show the power is
getting through?

Does the screen get brighter (or less dark) if you manually increase the
brightness to max on the TV? That should indicate whether the backlight
is working. Leave the remote out of it.

Is your remote control actually working? Either replace the batteries
with new, or point it at a digital camera when it should show up when
pressed in the camera viewing screen.

Does the manual indicate any way of resetting the TV manually using its
own controls? Sometimes keeping the on/off button depressed for a few
seconds does that. Otherwise, this may give you a steer:

http://eng-ca.faq.panasonic.com/app/answers/detail/a_id/20638/~/how-to-reset-the-tv-to-the-factory-default-settings.

Norman Wells wrote:
> On 08/08/2021 21:55, Roger Mills wrote:

>> Thanks. I'd *love* to get a menu on it, but it won't display *anything*!
>>
>> I've got the printed manual but, as far as I can see, you need the OSD
>> in order to apply a firmware update.
>
> First, check the aerial cable works OK with another TV.
>
> Disconnect everything from the failed TV apart from the mains lead and
> the aerial cable which should go directly to it and not loop through
> anything else like a video recorder.
>
> With the TV turned on, are there any visible lights to show the power is
> getting through?
>
> Does the screen get brighter (or less dark) if you manually increase the
> brightness to max on the TV? That should indicate whether the backlight
> is working. Leave the remote out of it.
>
> Is your remote control actually working? Either replace the batteries
> with new, or point it at a digital camera when it should show up when
> pressed in the camera viewing screen.
>
> Does the manual indicate any way of resetting the TV manually using its
> own controls? Sometimes keeping the on/off button depressed for a few
> seconds does that. Otherwise, this may give you a steer:
>
> http://eng-ca.faq.panasonic.com/app/answers/detail/a_id/20638/~/how-to-reset-the-tv-to-the-factory-default-settings.

Time to look at the power board, for leaking caps.

Especially with the sound of a relay clicking.

Sometimes you can find a Service Manual. Example of a
Panasonic, here. Just not the OPs one.

https://www.manualslib.com/manual/991120/Panasonic-Tx-L32s10b.html?page=9#manual

I wouldn't know where to start. There are only a few components
there suited to leak-checking. I was expecting to see more
electrolytics on it.

Paul

Norman Wells <hex@unseen.ac.am> wrote
> Roger Mills wrote:
>> Paul wrote
>>> Roger Mills wrote:

>>>> I turned on my Pamasonic TX-L26X 10B TV last night and, as often
>>>> happens, it reported that new stations had been found. I usually press
>>>> Exit at this stage in order to watch the existing channels but, for
>>>> some reason, I pressed OK to add the new stations.
>>>>
>>>> This seemed to invoke an automatic tuning operation, where it went
>>>> through all the channels starting at 21, and listing what it had found.
>>>> All the muxes here are in the 20s and 30s. After 37 it scanned more
>>>> radidly until it got to 68. Then the screen went blank, and the green
>>>> status light under the screen was flashing quite fast.
>>>>
>>>> After quite a while, I turned it off at the mains and started again -
>>>> but still nothing. It just sits there with a blank screen and no sound.
>>>> There's an occasional click from an internal relay and a slightly less
>>>> dark flash on the screen.
>>>>
>>>> It doesn't respond to any buttons on the remote. I can't get a menu -
>>>> so I can't reset it to factory conditions, which is perhaps what it
>>>> needs.
>>>>
>>>> Anyone got any ideas - other than a trip to the tip?
>>>
>>> The manual says there are six buttons on the side.
>>>
>>> F Volume/Contrast/Brightness/Colour/Sharpness
>>> Tint(NTSCmode)/Bass/Treble/Balance/AutoSetup (page 35)
>>>
>>> +/^ Up/down controls for things that
>>> -/v need a slider adjustment
>>>
>>> TV \__ Input mode selection
>>> AV /
>>>
>>> Power
>>>
>>> It's probably not the TV/AV selection, because if there
>>> was no signal on the AV inputs, the OSD would say "No signal"
>>> rather than just bobbling along with various shades of black.
>>>
>>> Firmware is loadable via SD, but you'd most likely need
>>> menu sanity for that to kick off.
>>>
>>> https://av.jpn.support.panasonic.com/support/global/cs/tv/download/fw/europe/down_eux21.html
>>>
>>> "Model Number
>>>
>>> LCD model ... TX-L26X10B ...
>>>
>>> Update Version Ver. 1.014
>>> Update File Name / Size
>>>
>>> P091_1014.zip / 7,535,616 bytes <== "SDDL.SEC" file inside
>>>
>>> Update Date Aug 31, 2012"
>>>
>>> PDF manual download, is just below the page image.
>>>
>>> https://manuall.co.uk/panasonic-tx-l26x10b-viera-lcd-television/
>>>
>>> Apparently, if you start the AutoSetup, you're supposed to be
>>> able to stop it, then manually program channels. But that was some
>>> other UK website that had the info.
>>>
>>> Summary: I would fiddle with those side buttons, just to get a
>>> menu on it. I don't really know what the best operation to
>>> try on it would be, after that. If you get the menu to
>>> appear, a visual check of the PSU board would not hurt.
>>>
>>> Paul
>>
>> Thanks. I'd *love* to get a menu on it, but it won't display *anything*!
>>
>> I've got the printed manual but, as far as I can see, you need the OSD in
>> order to apply a firmware update.

> First, check the aerial cable works OK with another TV.

It wont be that that’s stopping the OSD.

> Disconnect everything from the failed TV apart from the mains lead and the
> aerial cable which should go directly to it and not loop through anything
> else like a video recorder.

You don’t need any aerial cable to get an OSD.

> With the TV turned on, are there any visible lights to show the power is
> getting through?

> Does the screen get brighter (or less dark) if you manually increase the
> brightness to max on the TV? That should indicate whether the backlight
> is working. Leave the remote out of it.

> Is your remote control actually working?

You should be able to get an OSD without any remote.

> Either replace the batteries with new, or point it at a digital camera
> when it should show up when pressed in the camera viewing screen.

> Does the manual indicate any way of resetting the TV manually using its
> own controls? Sometimes keeping the on/off button depressed for a few
> seconds does that. Otherwise, this may give you a steer:

> http://eng-ca.faq.panasonic.com/app/answers/detail/a_id/20638/~/how-to-reset-the-tv-to-the-factory-default-settings.
>

In uk.d-i-y Paul <nospam@needed.invalid> wrote:
> Time to look at the power board, for leaking caps.

https://www.ebay.co.uk/itm/224278672631

Although the whole telly is on sale for £30, so may not be worth investing
very much.
> Sometimes you can find a Service Manual. Example of a
> Panasonic, here. Just not the OPs one.

Here's the service manual PDF (no need to speak Russian):
https://tel-spb.ru/files/Panasonic_TX-L26X10B_GLP24.rar

which has a 'Power LED blinking timing chart' which should indicate what's
wrong.

Theo

On Sun 08/08/2021 23:59, Rod Speed wrote:
> Norman Wells <hex@unseen.ac.am> wrote
>> Roger Mills wrote:
>>> Paul wrote
>>>> Roger Mills wrote:
>
>>>>> I turned on my Pamasonic TX-L26X 10B TV last night and, as often
>>>>> happens, it reported that new stations had been found. I usually
>>>>> press Exit at this stage in order to watch the existing channels
>>>>> but, for some reason, I pressed OK to add the new stations.
>>>>>
>>>>> This seemed to invoke an automatic tuning operation, where it went
>>>>> through all the channels starting at 21, and listing what it had
>>>>> found. All the muxes here are in the 20s and 30s. After 37 it
>>>>> scanned more radidly until it got to 68. Then the screen went
>>>>> blank, and the green status light under the screen was flashing
>>>>> quite fast.
>>>>>
>>>>> After quite a while, I turned it off at the mains and started again
>>>>> - but still nothing. It just sits there with a blank screen and no
>>>>> sound. There's an occasional click from an internal relay and a
>>>>> slightly less dark flash on the screen.
>>>>>
>>>>> It doesn't respond to any buttons on the remote. I can't get a menu
>>>>> - so I can't reset it to factory conditions, which is perhaps what
>>>>> it needs.
>>>>>
>>>>> Anyone got any ideas - other than a trip to the tip?
>>>>
>>>> The manual says there are six buttons on the side.
>>>>
>>>>     F     Volume/Contrast/Brightness/Colour/Sharpness
>>>>           Tint(NTSCmode)/Bass/Treble/Balance/AutoSetup (page 35)
>>>>
>>>>     +/^   Up/down controls for things that
>>>>     -/v   need a slider adjustment
>>>>
>>>>     TV \__ Input mode selection
>>>>     AV /
>>>>
>>>>     Power
>>>>
>>>> It's probably not the TV/AV selection, because if there
>>>> was no signal on the AV inputs, the OSD would say "No signal"
>>>> rather than just bobbling along with various shades of black.
>>>>
>>>> Firmware is loadable via SD, but you'd most likely need
>>>> menu sanity for that to kick off.
>>>>
>>>> https://av.jpn.support.panasonic.com/support/global/cs/tv/download/fw/europe/down_eux21.html
>>>>
>>>>
>>>>      "Model Number
>>>>
>>>>       LCD model    ... TX-L26X10B ...
>>>>
>>>>       Update Version   Ver. 1.014
>>>>       Update File Name / Size
>>>>
>>>>       P091_1014.zip / 7,535,616 bytes  <== "SDDL.SEC" file inside
>>>>
>>>>       Update Date   Aug 31, 2012"
>>>>
>>>> PDF manual download, is just below the page image.
>>>>
>>>> https://manuall.co.uk/panasonic-tx-l26x10b-viera-lcd-television/
>>>>
>>>> Apparently, if you start the AutoSetup, you're supposed to be
>>>> able to stop it, then manually program channels. But that was some
>>>> other UK website that had the info.
>>>>
>>>> Summary: I would fiddle with those side buttons, just to get a
>>>>           menu on it. I don't really know what the best operation to
>>>>           try on it would be, after that. If you get the menu to
>>>>           appear, a visual check of the PSU board would not hurt.
>>>>
>>>>     Paul
>>>
>>> Thanks. I'd *love* to get a menu on it, but it won't display *anything*!
>>>
>>> I've got the printed manual but, as far as I can see, you need the
>>> OSD in order to apply a firmware update.
>
>> First, check the aerial cable works OK with another TV.
>
> It wont be that that’s stopping the OSD.
>
>> Disconnect everything from the failed TV apart from the mains lead and
>> the aerial cable which should go directly to it and not loop through
>> anything else like a video recorder.
>
> You don’t need any aerial cable to get an OSD.
>
>> With the TV turned on, are there any visible lights to show the power
>> is getting through?
>
>> Does the screen get brighter (or less dark) if you manually increase
>> the brightness to max on the TV?  That should indicate whether the
>> backlight is working.  Leave the remote out of it.
>
>> Is your remote control actually working?
>
> You should be able to get an OSD without any remote.
>
>> Either replace the batteries with new, or point it at a digital camera
>> when it should show up when pressed in the camera viewing screen.
>
>> Does the manual indicate any way of resetting the TV manually using
>> its own controls?  Sometimes keeping the on/off button depressed for a
>> few seconds does that.  Otherwise, this may give you a steer:
>
>> http://eng-ca.faq.panasonic.com/app/answers/detail/a_id/20638/~/how-to-reset-the-tv-to-the-factory-default-settings.
>>
>>

The answer is simple - as already commented - the backlight has failed.
The easiest test is to get in the room in the dark at night with no
other lighting present and switch it on. If the backlight <is> working
you will still see a change in the screen brightness just after the
front panel LED stops flashing even though it is black. You should also
be able to see the effect/source of the backlighting if you get close to
the TV and look across the screen at one edge from the opposite edge -
there will be a slight glow on one edge if the backlighting is working
so you need to look at all four edges.
Per the relay clicking, with a Panny (I have one behind me as I type)
you know of course that the remote power button has to be held for a
second or two to power on - at which point the LED changes from flashing
red to flashing green coincident with a single relay click just before
the colour change.
We had a Samsung in our lounge that was my late fil's set vintage about
2006 and he died in Jan 2019. I was watching it one night, changed
channel and the screen went blank. I too went through every check I
could think of but couldn't get anything to work so wrote it down to
experience and binned it.
One thing I do notice: the HD ready panel on the Panny (also 15+ years
old) is significantly better then either of the two Samsungs that we now
have one of which is full HD.