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LG 50PS3000 No power with PD92A connected (mainboard?) Help Please!

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ritch50:
Hi everyone

I have a LG-50ps3000 plasma that has been moved from the wall, when refitting it refuses to power.
The standby dosen't light, completely dead.
When I disconnect the PD92A board, which I believe is the mainboard, the PSU relays click and the voltages all appear to be correct ffom the PSU. When reconnected, nothing.

Any suggestions?!

Thank you,
Rick

fix2003:
No Power Relay clicking check if short on vs line disconnecting z sus should stops clicking and vs should be ok if so  check 3 transistors on small heat sink in z sus  get repair kit from wiltsgrove

Q13,Q14(both type STF20NF20) & Q15 (FDPF 51N25)
their is  new control board is supposed to stop this problem.

also replace ZD201 (15V ZENER)

check the smd 1 OHM R209 for high resistance.

check the ceramic R201(10 OHM) for O/C

must also replace C8 & C31 on control pcb, to prevent repeat failure.check C653 on control pcb for ESR reading. all  100MF 16V.uprated them to 25V.
CONTROL PCB number EBR 5486 3601 or fit new version control board

zapzo:
hello need help with this problem hope get one ,i did bought kit to fix problem with reddish screen ,send to weld to a technician and pay 75 pound sterling,well to simple ,the tv now doesn't work no image no sound no anything,he inspected and now is the ppower supply who is the culprit ,but i dont know ,how to find out if the job that he done in the tv is wrong help

downunder:

Hi zapzo,
Not for us to know if you've been diddled. Unplug the Z-SUS board. If the TV stays on, you still have a problem on the Z-SUS. Did your kit have all the parts mentioned by fix2003?

If the TV stays on, reconnect the Z-SUS and feel the small heatsink at the bottom of the Z-SUS. If it overheats rapidly, you'll have to replace the Control board as well.        Bruce

zapzo:
Bruce thank you very much for great help this is a EBAY  purchased LG 50PS3000 ZSUS REPAIR KIT Poor Red Picture EBR55360601 EBR548636010 50PS3000za
Hope this is not the problem ,they gave me old parts back
hope this help something so i can go to technician and talk to them
thanks
Just bought a power supply ,that what he wrote in a paper

thanks

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