Any smoke, funny smells, visible damage ? If not maybe
it could be
repaired.
A note to the OP: Test the Non-CEM, but ordinary chips using coolant
spray. Perhaps some ordinary chip is borked.
I don't think that you'll see just some puffy capacitors, OTOH IIRC your
description doesn't lead to CEM chips, so I agree with Fons.
For taking a look and using coolant spray you don't need knowledge and
old gear usually is easy to open and to put together again.
I won't reply to the replies regarding to Phasex and DSI, they're
informing. Thank you!
Regards,
Ralf