Have TV Questions? Ask a TV Technician
Hello, I’m Nathan, and I’ll be assisting you today. My livelihood depends on your positive feedback, so your satisfaction is my highest priority.
Sorry to hear you’re having trouble.
Can you tell me where you got that replacement A board from?
Well if it was an ebay or amazon purchase for example, I'd be skeptical of the quality, even if listed as new.
But, there are several possible failures that can cause that pattern, the A board is the first check point, but not necessarily the primary cause of it.
Did you actually test any of the power supply voltages?
This error is not a simple board swap, there are a lot of detailed diagnostic checks that will need to be done.
That is beyond what I can do with you here for the initial scope of your question to do a step by step walk through.
I can opt out and perhaps another tech would be willing to guide you through.
The 10 blink code means that the mainboard is faulted. I have replaced more mainboards on tvs than I can count. As long as you can work a screw driver, you shouldn't have any troubles replacing it yourself. However, if you don't fee comfortable doing it yourself, you should bring it into a repair shop. I have given a link to a replacement mainboard for your tv below. When you remove the back side of the TV set, you will see three electronic boards. When you see them and have the replacement part in hand, it will be obvious which board it is.
- Replacement Mainboard for the TC-P42GT25: http://www.ebay.com/itm/TXN-A1LGUUS-TNPH0834-Panasonic-A-Board-for-TC-P42G25-/182094038819?hash=item2a65a68723:g:FYsAAOSwiYFXEP84
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