Re: Panasonic th42pz80u: backlight working but no display

I have a question for you guys. On page 44 of the service manual tom66 posted above, it says:
[INDENT][SIZE="2"]The result obtained on previous generations when D3 was disconnected, can
now be obtained by disconnecting A6/P6 and A7/P7.
When these connectors are removed, the A, K, GH, and S boards are disabled.
Normally Pin 2 of connector A3 is grounded by Q4014-Q4015. When A6 and
A7 are disconnected pin 2 is no longer grounded. This allows for the 3.3V
regulator on the...

Re: Panasonic th42pz80u: backlight working but no display

I can't find an A board online, so I borrowed an NI ELVIS oscilloscope from school and will try to pinpoint the problem.

Re: Panasonic th42pz80u: backlight working but no display

I've searched through these forms for similar problems. You guys seemed to have helped a few people with the same problem, but most of those guys didn't post results. It does seem to be the A board, like you guys suggested. I'm going to see if I can get a replacement tomorrow and I'll let you know how it goes. How important are revision numbers on boards like these? I've read that Panasonics are touchy when it comes to that.

Re: Panasonic th42pz80u: backlight working but no display

Why did you assume that it was one blink and did that fix the problem? Also when you didn't have video, were you able to get the on screen display?

Re: Panasonic th42pz80u: backlight working but no display

I'm working with Tetranitrate on this. The power LED won't show a blink code. I can use the power button to turn the TV on, but have to hold it to turn it off. Sometimes the TV will turn on again by itself after I've turned it off. I read in other forms that disconnecting A5, A6, and A7 and having the screen show all white is a sign that there's a problem with the D board. Our screen does glow white after A7 is removed.

We also don't seem to be getting any audio from any source. Since there is no OSD, we tried...