Panelsettings and sound om my Minimoog Voyager change spontaneously

[dth]

The display panel on my Voyager cycles like crazy through all of the knob settings. Sometimes it is gone for a few days, a few weeks or even some months, but unfortunately it always reappears. At first I thought it was some kind of midi-loop but even after disconnecting all the other gear (laptop, mixer, moogerfoogers etc.) and using only a headphone, the panel settings, sound and sometimes also the memory presets, change spontaneously.

On Moog's recommendation, I installed a new digital board but problems are still the same. I therefore reinstalled the original digital board.

What can possibly be wrong?

[till]

The power to the knobs is not stable and clean. And therefor the pot scanning gives random values around the set value.

[dth]

Thanks for your quick and clear response. Could this instability regarding the power to the knobs perhaps be caused by a (faulty) power supply or possibly something else (loose contacts etc.)?

[till]

These could be the cause. There might be others. But I am not a technician.