Hi,
this forum doesn't see much traffic these days, most people seem to favour social media!
Regarding the avcr, from memory, it was quite a rare beast even back in the day.
I just did a quick online search...
https://www.google.com/search?q=apexi+a ... s-wiz-serpHave a read through some of the posts...most common issues, broken wiring loom, have you lchecked for loose/damaged cables, or soemthing about grounding/earth...both grounds must be used, and both must be good quality groundings, again, check both.
Hope this helps.
Darryl