Reply to Unsolved issue - please help!

Hi everyone, I would be very grateful if someone could help solve my problem with my VCI-100 as it's proving very frustrating!

I appear to have a hardware issue. The result of which causes the VCI to cut out on the right deck, as well as skipping back to the last cue-point. I have tried many methods to solve this. In part it appears to be an issue with vibration, although it is very inconsistent. I'm curious as to whether this might mean that some soldering may be necessary. If so, is there anyone who may be able to guess whereabouts my issues lie? Any help would be appreciated.

I should point out that I have had my VCI converted to an arcade, but am unsure how this might be linked to my problem.