VJ1614a error code

Just purchased used vj1614a as non-working unit and it has CPU error [35] code and will not go any further. I've tried pulling the DIMM and cleaning contacts, checked the small ceramic fuse. Suggestions? If it turns out to be the main board, is there a difference in boards based on the board # Mine is 22224B, I've come across a 22224A and a 22224C, but they are listed as coming out of different printers. If those wont work, wheres best most affordable place to get replacement board?
TIA
Steven

 

Secondary question, based on assumption my board is bad - opportunity to get a main board # DE22224C from a working vj1304 can the firmware be updated to turn it into a 1614 board?