Panasonic TC-P50G10 Plasma No Picture, Red Indicator Only

[PohTayToez]

This plasma TV shows no activity other than the red indicator light that comes on when you press power. If you hold power down for a few seconds then the light will go off.

I've tried all the fuses on the power board and they test good. I've yet to find any other fuses other than a couple on the buffer boards that tested good.

I've tried disconnecting the buffer boards and shorting SC50 as described in this post. which did not result in a blink error.

The only thing that I've been able to do that resulted in a blink code was disconnecting the SC board which gave me a 7 blink error which I believe is to be expected.

Voltages almost all seem off. I'm getting less than one volt going to to SS and SC board and it seems to fluctuate a bit (will start low when TV first gets power and will slowly climb to around .5V)

I'm getting the following voltages going to the input board:
0.58v
5.16v
2.82v
14.56v
0.07v

I've got pictures of the boards if that helps and I've attached the service manual and a quick guide to the model.

Service Manual

[tom66]

Re: Panasonic TC-P50G10 Plasma No Picture, Red Indicator Only

When you plug it in, are any relay clicks heard?

[tw2005]

Re: Panasonic TC-P50G10 Plasma No Picture, Red Indicator Only

I'm thinking there's a dead short on the SC board if you've gone from no fault code , no startup to a 7 blink with the SC removed so A board is probably ok. You've measure the vsus ( I assume) to the SS/SC at zero so with the SC removed if you measure Vsus again from the PSu I'm expecting Vsus to be normal until the 7 blink cutout.

Could also measure resistance across SC2 terminals and see if shorted.