Samsung plasma ps43d451 5 blinks

[DjKrish]

Hi guys, ive been troubleshooting a samsung plasma tv. Ok heres the interesting part. relay clicks on, and off, 5 blinks thereafter and it recycles the same pattern.

I have disconnected one by one

Tcon
X board
y board

Still same, 5 blinks. I checked all the voltages on power board, when it clicks all the voltages are accurate according to the specs then it disappears when it clicks off. Seems like ive done all the troubleshooting here and it all narrows to a main board. Anyone else had this problem before?

[DjKrish]

Re: Samsung plasma ps43d451 5 blinks

Ok heres another update: I tested only the power supply, shorted PS ON to Ground, Then checked all the voltages that goes to the main board, all good and accurate. Tested voltages to Tcon, all accurate.

BUT, VA, VS voltage going to specified voltage upon turning on, then goes down fast. Is this normal without anything plugged in? Or it should be stable even with nothing plugged in?

[DjKrish]

Re: Samsung plasma ps43d451 5 blinks

Another quick update

Ive kept the PS ON shorted to ground on PSU, plugged everything to power board except mainboard. Shorted pin 1 and 2 jumper on tcon for test pattern auto gain, walla. Theres test picture. Tested power supply voltage VS and VA, stable and all good. So this confirm main board faulty. Will update here once i replace the main board

[DjKrish]

Re: Samsung plasma ps43d451 5 blinks

Replaced main board, tv working perfectly now Hope this helps others as well to troubleshoot.