Need Virus C / Indigo 2 experts & users help pls!

[cloudswim]

I just got a 2nd hand Virus Indigo2. Having some issues where the synth would just crash and freeze up unexpectedly. I would have to restart to correct the problem.This usually happens when I'm tweaking the synth while the voices are in unison with the arp and reverb on, modulated by LFOs. So it's pretty "CPU" intensive.

The freeze or crash symptoms don't always behave the same, sometimes it would just freeze with no sounds. Other times it would freeze while making high pitched buzz . On one occasion I could hear only the low-end content but the high-end weren't audible. If I switch it off & on again. Using the same patch and settings which is still stored in the edit buffer, it will play for awhile then the freeze symptoms would come back.

My question is if this is a chip board / hardware malfunction or more of a CPU overload? Has anyone encountered issues like this? I tried searching online, some people seem to have the same issue but never described the circumstances leading to the synth "freeze".

​Absolutely love this the Virus C sound, would like to know if this is a problem I can fix or have to live withAny input would be appreciated! thanks thanks thanks