Re: Panasonic Plasma Likes Naps

I did keep the old board, it's TNPH0893 1A nil suffix. I think it's unique to the 46". At this rate, it may be a good idea to keep a spare.

Re: Panasonic Plasma Likes Naps

Thanks to all for your input. I bought a used A-board off of the auction site for $135 and it appears to be back in business (just did a relay check so far).

I'm wondering if there are any mods that could extend the life of the under-cooled chips. I do have a 12v fan around somewhere that I scavenged off of a computer. I'm not sure how noisy it is, meaning audible and EMC. Is there a good place to tap into 12v on the power board? Bad idea?

Re: Panasonic Plasma Likes Naps

I never had any SOS codes, that I noticed at least. I just followed a trouble shooting flowchart that I found on Elektro Tanya: no relay click -> 5v standby voltage present -> unplug A1 on A-board, still no relay click -> replace the A-board. Argh! Not the answer I wanted. Now to see how much they are...

Re: Panasonic Plasma Likes Naps

I took a closer look at the power board, removed it to look at the back, no signs of over-temp or swelled or leaking caps. Then I put everything back together except the back cover to do the heat test and now it doesn't turn on at all. Are there some power test points that I can check? Thanks.

Re: Panasonic Plasma Likes Naps

Thanks, so there's no thermal fuse that would cut power then reset once it cools? Noob question, but where's the A-board? I can see if the chip (micro?) looks like it got hot.

Hello all, I'm new here and thought this would be a good place to get some advice on my Panasonic TC-P42GT25 3D plasma TV. It's a Nov 2010 model and about 3 months ago it started turning itself off after about 20 to 40 minutes of watching. It's been a good feature to minimize the kids' TV time, but I need to fix it. When this happens, it's unresponsive, won't turn back on, the remote and button on the side do nothing, no clicks, no flashing lights. If you leave it alone for about 15 minutes, you'll hear a click and voila, it comes back on!

It sounds like a thermal relay of some...

Re: New Members - please post your introductions here

Hello all! No formal training in any of this, but I have dabbled in electronic home repairs in the past. I just finished re-capping my vintage AR-91 speakers which are burning-in in the background as I type. Now I'm ready to tackle the Panasonic Plasma that only wants to play for 20 minutes or so before taking a rest. Looks like a great site, thanks for being a part of it!

Fritz