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

[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