Panasonic VIERA TC-P50GT25 Endless loop of clicks.

[seanx]

Hi guys,

I have seen this asked a couple of places, but have never seen any response or resolution to this particular problem and I'm hoping one of you gurus has the answer or at least where to start.

I have a Panasonic VIERA TC-P50GT25 from 2011 and 3 times in the past 3 years when I turned it on, the light will turn on solid red (no blinking) and it will click as if turning on (black screen) and then click as if turning off again. This cycle will repeat endlessly. 2 audbile clicks in an attempt to turn on, 2 clicks off etc, always a solid red light. This has always resolved itself in the few times it happened in the past, but its been this way for a week now and is unable to get itself out of this cycle.

Anyone have any ideas or where to start? I dont mind pulling out the multimeter if necessary or changing some caps if its a known issue.

Thanks!

[dick_barton]

Re: Panasonic VIERA TC-P50GT25 Endless loop of clicks.

Can you post some clear focused picture of the circuit boards.

[seanx]

Re: Panasonic VIERA TC-P50GT25 Endless loop of clicks.

Can you post some clear focused picture of the circuit boards.

I sure can ... In the meantime, there was an interesting development today. After I hit the power button on the TV, I also hit the menu and or source button a few times and after a few seconds the screen actually turned on. Heres the interesting part....

The screen turned on to the choose your language screen. I let it sit a couple of minutes then pressed enter to select english and it immediately gave that audible click and the screen turned right off.

I was able to this again again, leaving it on for about 10-15 minutes where the screen stayed on the whole time on the choose your language screen. The second I pressed enter the screen turned off and gave me that click as if it was turned off.

Now .. When you select the language or utilize another board which is where this issue comes into play? Is the language screen in its bios (do these TV's even have a bios)?

It is hitting a wall somewhere that will turn it off immediately.

Thanks guys!

[Moreno83]

Re: Panasonic VIERA TC-P50GT25 Endless loop of clicks.

Well this looks like a mainboard issue to me. Especially when you get the option to choose language. ( TV reset itself ). Maybe EEPROM problem?
You can relate it to the bios in a pc. Remove battery and date/time is gone.

Ps , dont leave the tv on the language screen because of burn in.


Mainboard is the board with the HDMI ports on it. Capacitors dont fail on these Panasonic plasma tv's. They are build very well.

[tw2005]

Re: Panasonic VIERA TC-P50GT25 Endless loop of clicks.

It's unlikely these dumps will help as it's sounds mainbaord issue or the 48pin NAND flash IC8501.

If you do use these, copy and back up your originals first. If you get the TV running with these I would not mind knowing what hrs come up in srv tool as this is meant to be from a brand new tv with cracked panel.

TNPH0893AB

[seanx]

Re: Panasonic VIERA TC-P50GT25 Endless loop of clicks.

Is there a way to verify and/or test the issue is indeed the main board? If so, are there any fixes aside from replacing it?

Thanks

[seanx]

Re: Panasonic VIERA TC-P50GT25 Endless loop of clicks.

[seanx]

Re: Panasonic VIERA TC-P50GT25 Endless loop of clicks.

Can you post some clear focused picture of the circuit boards.

Is there anything I should be looking for in particular? The boards seem to look ok.

[Moreno83]

Re: Panasonic VIERA TC-P50GT25 Endless loop of clicks.

Is there a way to verify and/or test the issue is indeed the main board? If so, are there any fixes aside from replacing it?

Thanks

There is no problem with the other boards.

The fix is what TW2005 said. You need to reflash the EEPROM with the data he provided.
If that is to hard....get a new mainboard.

[tw2005]

Re: Panasonic VIERA TC-P50GT25 Endless loop of clicks.

There is no problem with the other boards.

The fix is what TW2005 said. You need to reflash the EEPROM with the data he provided.
If that is to hard....get a new mainboard.

I never said that. Also in case you did not pickup, I can't get the data of the 48 pin NAND. I don't know the solution, definitely mainboard.

[seanx]

Re: Panasonic VIERA TC-P50GT25 Endless loop of clicks.

This is a head scratcher. I held down the enter button when selecting the language button and it powered the screen back on and is currently still working this morning.

This one seems random, as there are no blink codes and no real rhyme or reason behind it.