Spent the day doing more testing of my GPUs in storage and now I have two dead Voodoo3 PCI cards, both just black screen and cause the PC to beep. So either its dead bios or possibly the voltage regulators, not sure how to test and replace them but it cant be ay harder than recapping an entire motherboard.
So ill set them both aside till I have time to operate on them ... or I find someone who knows what they are doing and get their advice.
Kicking myself too since both are high end V3 cards, one is a 3000 the other is a Compaq OEM 3500 with a normal VGA port so its worth repairing.
Also tested my Voodoo5 and it works ok but needs new fans as the OG ones have finally bit the dust, anyone have suggestions for good replacements that don't require weird attachment solutions 😁