Emu emulator 2 sampler

Hi I have an emulator 2
That boots up okay loads disks
But has no sound at any of the outputs
It won’t sample any incoming sounds either
Fires up ok so wasn’t sure if it was a power supply issue
Also it still uses the original disk drives which must be okay as it loading disk
Anyone got any ideas or a starting point

Start with PSU check. I remember I`ve had the same issue, and resoldering pins on power connector helped.