CPTOH-0602 blank screen

[miniman82]

So I came across this plasma display at the recycling place, and figured I'd have a go at repairing it. Both sustain boards were shot of course, so Y got an NOS Sanyo IPM, and I was able to salvage the Z board IPM by replacing the on board IGBT's with through hole devices. There's a video on you tube showing how this is done.

It powers up now and gets a dull light on screen, but it acts like it doesn't have any input. The buttons on the side don't bring up any of the menus like they should either, so I'm thinking dead main board?