LG 50PZ550T 50 inch plasma

[efwiofoi]

I have an lg 50PZ550T 50 inch 3d plasma, it works normally for 2 hours then turns off. when it goes off the red light does not come back on, if i switch it off with the remote the light comes on and it will turn back on and work for half an hour again.

I've taken the back off but not sure what to do next having only ever fixed lcds.

everything looks good no bulging caps.

should i test voltages?

the picture is perfect when working.
thanks

[tom66]

Re: LG 50PZ550T 50 inch plasma

Check Vs, Va, etc. before and after power off. As it is intermittent start tapping things with an insulated screwdriver, also try heating up things and see if you can make it shut down (a hairdryer works well)

[efwiofoi]

Re: LG 50PZ550T 50 inch plasma

i think its the y sus board, the tv stays on all day with the back off but heating this board seems to make it go off. tapping makes no difference. i think i will replace the board but it has 4 adjusters (set_up), (set_on), +vy +vsc, could adjusting any of those help?

[mmartell]

Re: LG 50PZ550T 50 inch plasma

No but you could try resoldering all joints of components on heatsinks first. You may have a cracked joint making intermittent contact when it expands with heating.