Akai DPS-24 no sound

Where can an Akai DPS-24 be repaired?There is no sound form the headphone outputs.
No sound from audio outputs except static noise from digital audio outputs.
No sound from music on internal drive meter shows levels normally.No sound from
internal CD player playing redbook audio CD.No sound from working instruments/amps
plugged in to DPS-24.
Could this be caused by a defective digital/analog circuit board?
Any help finding a way to repair it is appreciated.
Thanks.