E-mu Emax 1000 no sound


I’m having an issue with my Emax 1000. There’s no sound on any of the outputs. When I turn up the volume really high, I can hear a faint sound of an envelope trying to trigger the sample.

I’m pretty sure it’s related to the digital part of the synthesizer since I disassembled another working Emax I own and switched the audio boards between them - no sound playing from the transplanted audio board from the other Emax. Could it be the E-chip or corrupted RAM chip?

I’d greatly appreciate any help on this issue.