Panasonic TCP50G20 10 Blinks

[mfucilli]

Hello all. I'm hoping someone might be able to shed some light on an issue that I'm having with my Panasonic Plasma. I've read all the similar problems, but nothing seems to quite match what is going on here...

I went to power on the set the other day and it would not turn on. Just kept clicking like it was trying to turn on, then off, then over and over again. I tested and narrowed down the problem to the A Board and ordered a replacement from encompassparts.com. Just installed the new A Board today and solved the clicking issue... however now I get a 10 Blink error code.

I have tried to isolate this, unplugged the SC board and powered up, the result was the same 10 Blink error. Unplugged the SS and powered up, result was still a 10 Blink error.

Would this be an issue with the P Board or do I have a faulty A Board? Not sure how/what to test next.

Thanks in advance.

[RCA2000]

Re: Panasonic TCP50G20 10 Blinks

Blink code says abnormality in the 15 Volt supply. Possibly a SC board or SS board problem...I recall being told that pretty much ANY blink code can be set by an SC Board..


ALSO...do NOT forget to check the SD card slot...for something shorting it. This can ALSO set this code..

[RCA2000]

Re: Panasonic TCP50G20 10 Blinks

This might be of some help... There is a flow chard on page 51 for 10 blinks ::

[martino]

Re: Panasonic TCP50G20 10 Blinks

TV off,

disconnect SC2, SS11, P35, and the 3 white ribbons on the side of the A-board.

Now turn it on, if it turns on and no error blinks the P and A are ok. Do this for less than 30secs.
If it still blinks then your mainboard is bad.

Turn it off, don't reconnect anything for 5 mins or so.

[mfucilli]

Re: Panasonic TCP50G20 10 Blinks

RCA2000, thanks for the troubleshooting manual. That's a huge help, I only had access to the service manual.

martino, I will try this test this afternoon and post the results.

Stupid question, but since I've been working on this around working full time and going to school... is it okay to keep the panel face down on a flat workbench, or should I keep standing the panel up in between repairs?

[Neelix]

Re: Panasonic TCP50G20 10 Blinks

Do you have the stand for the panel? Ideally you should keep the panel upright between repair attempts using the stand, but if you don't have the stand then keeping the panel face down on the workbench would probably be the safest. Just make sure there is something between the panel and workbench to prevent scratches

[mfucilli]

Re: Panasonic TCP50G20 10 Blinks

TV off,

disconnect SC2, SS11, P35, and the 3 white ribbons on the side of the A-board.

Now turn it on, if it turns on and no error blinks the P and A are ok. Do this for less than 30secs.
If it still blinks then your mainboard is bad.

Turn it off, don't reconnect anything for 5 mins or so.

Here's the results of the test:

When press the power button on the unit, I get the 10 blink error code. So I'm assuming either the P Board is bad or the replacement A Board is bad. I've read somewhere that a shorted SD Card reader could cause this on the A Board, what's the best way to rule that out? On the P Board I tested resistance at the three points indicated in the service manual. Each was above 1K, however the check for Vsus seemed to fluxuate more than the others...

I do have a new P Board on the way, regardless. But I'd like to rule out the possibility of the A Board being bad... I ordered that one from encompassparts.com.

[Alastair E]

Re: Panasonic TCP50G20 10 Blinks

Do what Martino suggested--That'll tell ya whether the A or P is faulty.

Personally, I'm suspecting A.

[martino]

Re: Panasonic TCP50G20 10 Blinks

Here's the results of the test:

When press the power button on the unit, I get the 10 blink error code. So I'm assuming either the P Board is bad or the replacement A Board is bad. I've read somewhere that a shorted SD Card reader could cause this on the A Board, what's the best way to rule that out? On the P Board I tested resistance at the three points indicated in the service manual. Each was above 1K, however the check for Vsus seemed to fluxuate more than the others...

I do have a new P Board on the way, regardless. But I'd like to rule out the possibility of the A Board being bad... I ordered that one from encompassparts.com.

You can check if something is jammed into the sd slot(a coin or something) but I'm afraid that A board is bad.

[mfucilli]

Re: Panasonic TCP50G20 10 Blinks

You can check if something is jammed into the sd slot(a coin or something) but I'm afraid that A board is bad.

Yeah, there's nothing in the SD Slot. The P Board wouldn't be suspect or worth replacing? Man that would suck if this A Board was bad, it was the replacement I ordered for the original bad A Board... which I went right to the manufacturer supply. Any other suggestions for getting a good A Board? ShopJimmy.com didn't have any and I was less inclined to trust an eBay board. I need a TXN/A1MGUUS (TNPH0834AE) A Board if this one is bad too.