Samsung Plasma Model PN42C430A1D Power issue

[tech2014]

I have a Samsung Plasma TV with a power problem. I found shorted IGBT on both YSUS and ZSUS. I replaced the parts. I power uptake TV and I get the power up chime. Power stays on and LED on logic board blinks at 1 second intervals, which means everything is good. When I connect the YSUS buffer board into the circuit, the parts blow again. The buffer board PCB number is LJ41-08594A, PBA LJ92-01739A.

I tested the buffer and found no shorts. Would an open circuit on the buffer short out the Y and Z SUS boards, or is it the panel. See pic of buffer board below.

[tech2014]

Re: Samsung Plasma Model PN42C430A1D Power issue

So nobody has any idea??