Re: Panasonic TCP42S30: Repeated SN Board Failures

I considered that the SN board was running too hot and caused the last failure. One IGBT had a scorch mark around it, and the IGBT's that were replaced were near the top of the board where temperatures might be highest. Like Alastair mentioned, I can easily add some fans to pull hot air away from the SN board. I found 80 mm fans with USB power that should easily mount on the ventilation holes over the SN board on the tv rear cover (Coolerguys Dual 80mm USB Cooling Fans, $16). High temps may not be the problem, but if it is, it's...

Re: Panasonic TCP42S30: Repeated SN Board Failures

Not certain, but think it's set to vivid mode. Will check when we get it running again. It took a lot of adjustment to get the picture quality we liked. Then we upgraded our cable package and the cable guy botched up the picture before he left. Might try the cooling fan idea. Thanks.

Re: Panasonic TCP42S30: Repeated SN Board Failures

Thanks, Tom. We'll see how this repair goes. If it fails again then maybe we'll try a different SN board. Nicholas said he never sees repeat failures on SN boards, so perhaps the failures are caused by a problem with our particular board.

Re: Panasonic TCP42S30: Repeated SN Board Failures

I replaced the screws that hold the board to the chassis with ones with washers supplied by the shop that did the first repair. I will carefully inspect the ground pads for evidence of arcing when we disassemble the tv this week. If you have not seen repeated failures of the SN board at your shop, that tells me something else besides defective parts is causing the problem with our board. Thanks for the reply.

We really like the picture quality of our Panasonic plasma, but a recurring problem with the SN board is making us question keeping the tv. First it was a solid red light SOS. We sent the SN board to a repair shop, and it worked fine for the next 9 months. Then it was a six blink SOS. The 2011 Panasonic Troubleshooting Flowchart said it was the SN board again, so we sent the board to a different shop. It lasted 4 days this time, and then gave the 6 blink SOS again. Hopefully the repair shop will honor their 90 day warranty.

Is this repeated SN board failure likely to keep happening?...

Re: New Members - please post your introductions here

Greetings to everyone. My quest to repair our Panasonic Plasma continues.