I've had this problem with some video cards on some LCD monitors. Try switching monitors, try a CRT if you have one.

Interesting, i did not think of this. I will try on a crt and report back. Thanks for the suggestion.

Wow, i have left this card connected to my NEC multisync 75 for about 15 minutes now, and it has not blinked out once. Ironically i would have ended up connecting this to a crt when i thought I had it finished, but i genuinely thought this video card was toast and didn't plan to even use it since i do all my testing and prep on a LCD.

Thank you so much Shamino, you made my day.

Well spoke too soon. I had previously bridged or bypassed one of the L ferrite beads?? In troubleshooting last time i had the card out and i know this didn't change a thing with the LCD monitor i test with, however when i tried on a crt this time around the system seems perfect. I just removed the L5 bridge and low and behold the card is now blinking in and out on the CRT. Can someone tell me what L5 is and where to order one?

You might have problem with power on the Voodoo, ripped/leaky capacitors?
All the L are filters (together with capacitors near them), they cut out high frequencies (harmonics). You would not have a proper picture at all if one of them was damaged (open).

Instead of guessing its best to slap an oscilloscope on VGA signals and check levels, frequencies and consistency (H V syncs).

Not sure if this will attach and play properly, but here is a short video of what it is doing now on the CRT even after I shorted L5 back like it was when it was working. Forgive the background, my son was playing the arcade off to the side.

https://drive.google.com/file/d/149MXss6eDf29 … iew?usp=sharing