Hi guys question on buffer board

[davewilson61]

got a 50" samsung plasma tv

tv comes on no picture
found 1 bad chip on the upper buffer board (fried)
even if i unplug this upper buffer board should i have a picture on the lower half of tv?
i dont.....

lower buffer board has no shorts to ground asumming its good
could my y board be bad? any way to check it?
if i just order the bad upper board and replace it would it be Fried from the y board if it was bad?

thanks dave

[rayrod81]

Re: Hi guys question on buffer board

Most of the time on Samsung plasma TVs a bad buffer will take out the Y-main board. Sometimes it does not happen but generally it does. When you unplug the upper board on a Samsung you will not get a picture but the screen should light up and just show a black screen on the lower half. If it does not light up then the Y-main is toast. It is very likely that plugging a good upper buffer in to the Y-main will just fry the board immediately. In most cases you will need to repair the Y-main and replace both buffers. Even if the lower buffer tests good it may just be a matter of time before it fails. What is the model number of the TV? That info will help us help you.

[anomaly]

Re: Hi guys question on buffer board

A bad Y-main board will be the cause of that one bad chip on the buffer. Remove and check all of the mosfets on the y-main, at least one of them will be shorted.