Panasonic TC-P50x1 plasma

[TrueReb]

I had the 7-blink of death. I ordered a new SC card from shopjimmy.com. The 7 blinks went away but now only the top third of the screen works, the bottom 2 thirds being black. Are there some resets I need to do or do I still have hardware issues in other areas?

I scoured the forum but didn't see similar posts. Sorry if this is a repeat.

[TrueReb]

Re: Panasonic TC-P50x1 plasma

No takers?

[attainteddragon]

Re: Panasonic TC-P50x1 plasma

from what i know of these, you may still need to reseat the cables from the buffers possibly another dozen times. apparently rather annoying to get them to seat properly.

[TrueReb]

Re: Panasonic TC-P50x1 plasma

Thanks, thought the same thing, have reseated them 4 or 5 times, will go for a dozen.

[TrueReb]

Re: Panasonic TC-P50x1 plasma

Tried reseating several times. Maybe a bad buffer board?

[dj01fad]

Re: Panasonic TC-P50x1 plasma

Check the buffers for shorts; If there is one, I guess the bad chip is situated where the "black" area starts, in your case on the SU board.

[TrueReb]

Re: Panasonic TC-P50x1 plasma

I ended up replacing the SU which fixed that problem. Now I have several horizontal lines in the top half of screen. Bad cap somewhere maybe?

[tvtimmy]

Re: Panasonic TC-P50x1 plasma

Power it down and play with the ribbons again, and again, and.................GOT IT!

[TrueReb]

Re: Panasonic TC-P50x1 plasma

yep, figured that. Cleaned ribbons with alcohol, better, but still faintly there. Downloaded the service manual and going to try a few resets then back to the ribbons.

[TrueReb]

Re: Panasonic TC-P50x1 plasma

Have reseated ribbons 7 or 8 times now. Still have faint gray bars (never did have black solid). Getting tired of having this thing on my dining room table (wife too).

[tvtimmy]

Re: Panasonic TC-P50x1 plasma

Give us a picture of the screen. Take one of it in the all white test pattern.

[tom66]

Re: Panasonic TC-P50x1 plasma

It is easiest to realign the cables when the screws are out from the respective boards. The ribbons must be dead straight or it won't work. You shouldn't be able to see any copper.

I wouldn't advise alcohol in the connectors due to the high voltage. It could cause a short/arc between lines which will kill the buffer board. Also the electrons might get drunk.

[TrueReb]

Re: Panasonic TC-P50x1 plasma

Thanks tom66, I'll try that.
Being a tech, I always clean connectors, I make sure they're dry (after a few hours or by compressed air) before re-connecting. I've run across dirty/corroded connections many times that were invisible to the naked eye.
To a non-tech: NEVER apply any liquid to an active electrical circuit/circuit board, as tom66 said, the electrons might get drunk. Nothing worse than a wasted circuit.