Re: Samsung PN58B550 no picture, replaced almost everything





I have an interesting one on my bench I hope someone can shed some light on. It is a Samsung PN50A530
When turned on I get sound, no picture. No VS supply, all other voltages good.
LED2000 light, the other 2 flashing on logic board. Let sit turned on for 20 minutes, LED2000 goes out, the VS comes on at 204V correct, and the picture comes on and works perfect. Untill turned off, then it takes 2o minutes to get a picture again. Since picture is perfect when it finial comes on...

I have a question, I have a Samsung 51" plasma, buffer board had an IC that had a few pins that shorted.
Replaced it, when I power up set, I see the screen light for a second, then the power supply is forced off by the control board.
Checked Y sus and Z sus, no shorted diodes or FETs.
Anyone have any ideas. It was a used buffer board from shopjimmy, and there is no shorts detected between the power and panel connectors unlike the original board.
Original symptom was similar, except there were some bright horizontal lines at the bottom for a fraction of a second...