This old Rotel RA-840B powered up but had no sound as none of the inputs worked.
Compared to some amplifiers this faulty Rotel RA-840B amplifier is a fairly simple design as it doesn’t have any tone controls so it isn’t crammed with electronics and multiple circuit boards.
It was also easy to take apart which makes repairing it easier.
The no sound problem was due to a fault with the power supply that powers the preamp preventing it from working properly.
If you need a Rotel RA-840B amplifier repaired please contact me for a quote. I’m located in Nailsworth near Stroud in Gloucestershire. Items can be dropped off by arrangement or shipped.
Electronics and Audio Repair Services
Here is a video about the repair that’s on my YouTube channel.