I have a Fat Frog desk here with a coupe of faults. They are:
* Video output is noisy - causing the text to "rip" and "shiver" on the screen.
* Whilst all the faders work ok, when you move some (say channel 1), a value of another fader (say channel 6) will jump up and down and often not return to zero. This appears to happen right across the board. The other channels value may only jump up and down by a small value, or sometimes more.
I haven't had the desk apart yet, but this sounds like either a PSU issue (failing/noisy output) or a grounding problem. Any pointers please? I am a qualified electronic service engineer, so can tackle most faults.
Many thanks, Dan