Denon Prime Go Fader repair

got a used Denon Prime Go and channel 1 fader is borked. it only will play audio at 90%-100% point of the fader and it’s still has “flutter” if I could explain it.

also some of the knobs feel vary worn down but I’d assume that this could be resolved with it being re-greased with whatever it was originally used too

Where should I go to get this repaired?

The equipment needs to be dismantled, cleaned and the faders and keys lubricated with contact cleaner and silicone grease. If you don’t know how to do it, I recommend taking the equipment to an accredited technical assistance.