samsung ps50b530s2wxxu

[snipersquad100]

I got this samsung ps50b530s2wxxu plasma tv, its dead no led.
I've only got voltage on the ps on at 2.8 volts and standby of 5.3v.
My guess is the main board or power supply board, but I don't know where to go from here.
Any help greatly appreciated.
thanks

[tom66]

Re: samsung ps50b530s2wxxu

PSON high means main board is sending OFF signal (Samsung is backwards to other TVs)

So get a 100 ohm resistor and force PSON to GND and VSON to 5V standby (with the connector disconnected from the main board.)

Then put a jumper across pins 3&4 of the test connector on the logic board and unplug the LVDS cable between logic board and main board.

Plug the TV in, do you get test patterns?

[snipersquad100]

Re: samsung ps50b530s2wxxu

yes I get different colour screens
What doesthis mean.

[tom66]

Re: samsung ps50b530s2wxxu

That means the main A/V board is bad.

As long as there aren't any defects on those screens that should be all that needs replacement. (Personally I've never successfully repaired such a board.)

Defects: vertical/horizontal lines (panel fault), sparkling pixels when changing etc. (main board would still be at fault but these would also need rectifying)

[snipersquad100]

Re: samsung ps50b530s2wxxu

ok thanks Tom

[snipersquad100]

Re: samsung ps50b530s2wxxu

Just a shoot in the dark, It couldn't be the switches pcb ie on/off ch vol that's at fault. im just thinking it might not be telling the main board to switch on. that might also be why theres no led?

[tom66]

Re: samsung ps50b530s2wxxu

Well, you can try it, but it probably is not. For example remote control signal is separate, as is LED. The board is just an extension for various signals generated on the main PCB (the buttons may use a controller, but IR and power LED are separate)