No commentary on Analogue CMVS except - motherflower they are expensive - I had no idea such a thing even existed.
Normally I have a pile of crappy but working 1-slot boards for testing. Never know what weird and wonderful errors I'm going to get from untrusted carts, poorly executed boots, dodgy z80 test carts and other razorblades left over from the 80's in someones box of spares.
As for what's going on. That screen looks like the "I can't boot" screen.
Sometimes it will be static - couldn't boot so gave up - normally you get this of one the critical chips is missing altogether, or so badly damaged that it's doing nothing.
other times it will be flick on and off, with the click of death through the speakers - nearly booted but the watchdog detected a problem and rebooted, normally in an infinite loop.
I'm struggling to imagine how any cart could cause this much damage. Maybe a failed bootleg where they wired +5v right onto the address bus or something? Maybe some disgruntled arcade service tech in the 90's made a sabotage cart to mess up his boss? Starting to sound a bit paranoid...
If you wanted to open the suspect cart up and take some pictures of the boards (both boards, both sides) there might be some clues as to what happened, and what to do next.
