Thank you for the information. I'll wire the 3.5 V, but I'm pretty sure I knocked the pad off on the 2nd reflow.
There's another lead that I accidentally severed fixing a solder bridge. The end connected to the FBI still goes to GND, so it is connected internally. I assume its safe to leave this pin severed. The pad is OK, just the lead is cut.
EDIT: I followed your routing path recommendation to get 3.5 V to that pin, but the error at boot persists. Soldering two wires isn't too bad, so I'm back to considering the replacement FBI chip. Is there any other component you think could be the culprit? There looks to be 5 fuses on the board, FB1 thru FP5 and FB7, and they all show a short. There's 3 transistors, which I assume are for the RGB signals. Would these transistors going bad result in this error? I suspect not because I'm guessing those transistors are used for switching the pass-through cable. I also wouldn't think that faulty memory chips would result in the error we are seeing, but would display artifacts.
If you have plenty of these FBI chips which are NOS and don't mind sending one, how much would shipping be to Canada? I'm assuming there are several people who have a vested interest to know if replacing the FBI chip will resolve the issue.
Pending no other ideas to test for, and confirming shipping isn't too $ for this chip, I would 1st proceed to cut off the FBI chip and remove the leads to ensure I don't loose any more pads.
I've found a few online shops which have the 500-00090-01, but they are expecting orders in quantity. https://www.cyclops-electronics.com/parts/3df … ctiv/500000901/
Here's one which may take less, but the website looks really sketchy, http://www.yxfic.net/english/3dfx/500-0009-01.html
I'll try this seller from alibaba to see how much, but shipments from China have come to a crawl. https://www.alibaba.com/product-detail/-ic-ch … .37a45679EAcVj0
EDIT2: heard back from that seller on alibaba. The price is ridiculous.
500-0009-01 3DFX QFP MOQ=5pcs*31.9usd/pcs=159.5USD
22usd by EUB to Canada in 15-20 days