I have this Samsung plasma HP-S5053 that I picked up online. It had no picture but had sound. Opened it and discovered several bubbled/shorted buffer ICs on the buttom buffer board, so ordered one online. Upon installing it, the TV came on, but the bottom half had uneven bands of brightness. It was as though there were differing bands of contrast for the bottom half. Thinking this is surely a lower buffer board problem, ordered yet another lower buffer board and installed it. This time the picture looked even and normal, alas only for 5 minutes. Now the lower half has no picture at all. Looks like there is still a glow there, but no picture. Half the screen might indicate a lower bad buffer board, but I removed the buffer board and tested it for shorts, found nothing no shorts, also reinstalled the first replacement buffer board, only this time no picture either (the bands were an improvement over no image). Removed the Ysus and tested various things for shorts etc and found nothing (only blew one Zener diode during testing which I removed for now). Anyway, I am lost as to what the hell is going with this TV. Just before posting this I read Tom66 comment in one of the posts that a bad Last IC on the upper board can possibly break continuity with the lower one there by disabling the whole lower half. I wonder if this is correct, but decided to post it hoping it can help me and others.
Attached Files
Maybe the connection that links the address chain between the upper and lower buffer was broken ?
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