If you've not already popped over, I'd strongly suggest asking the same question at the MPU Mecca. Being made by Crystal I'd normally assume it's JPM hardware but it's such an odd looking cabinet I'm not sure. Doesn't look like the normal JPM IMPACT based stuff, could have been made using whatever the tech before that was (System 5)?
As for what is wrong, I'm going to be honest here - parts will almost certainly be available, but when you buy an old / rare machine like that, they aren't going to be cheap. Might be worth looking at trying to repair the existing board, and probably PSU since that may well have issues. There's some excellent techie types at the Mecca, including ones who repair and sell boards, and ones who can talk you through repairs.
If you haven't already got one, I think I'd suggest you get a digital multimeter and a soldering iron!
Edited by Bencrest, 28 October 2013 - 11:56 AM.