hifi engine

Technics SUX-901 Amp


I have an intermittent problem with my SUX-901 digital amp whereby sometimes it produces no output. Sometimes it works absolutely fine straight away. Sometimes it will come to life 30 minutes after being switched on and on other occasions it won't work at all! All the display lights up. It also occasionally makes a load pop. I have checked all the set up and it is all plugged in correctly. None of the speaker wires are shorted.

I have had this system for 20+ years and don't want to part with it! Can anyone suggest what to do with it/what might be wrong with it?

Appreciate any suggestions.