Sorry to hear your still doing battle with this problem. I can't find a copy of the email I sent you regarding putting this rig back together. I was going to review it to see what I may have left out that could help you. Want to send me a copy if you still have it and I'll go over the details again if you like.
You didn't mention if you ever got the VOX board back in. If so, chances are you've discovered why you took it out in the first place. Certaily the VOX board was overloading the 12 volt supply if it wasn't in the radio.
Actually, I have to agree with the last post. If you weren't able to restore the radio by reconnecting the VOX board with all the detail I gave you perhaps someone needs to troubleshoot it down to the component level, or at least troubleshoot the 12 volt overload board by board. Could be anything since 12 volts appears on almost every board, and if you're not familiar with following schematics you're best advised to ship it off somewhere.
Hope you get things resolved, it's a nice radio.