Vortex Sound Research

My friend has an old ARP odyssey from 1972 which is broken. When we first turned it on it didn’t make a sound at all, but giving it some warm up time and sliding around w the sliders got most things working again. However the CV seems to be broken. We hooked up a multimeter to the CV and it gives abt 1V difference for high and low C. Does anyone know a good way to fix this? Also the white noise and pink noise generator doesn’t switch between the two (nothing happens when we switch from white to pink), but I think the cv is our top priority right now.