Mystery: Fixing Discolored Voodoo 2 VGA Output (Creative CT6670)

This CT6670 Voodoo 2 from Creative suffers from bad solder joints. The debugging tool mojo reports an incorrect number of TMUs as well as wrong memory sizes for each chip. I thought a simple reflow of the solder around all 3Dfx chips would solve the problem - but that wasn't the case. This Voodoo 2 card has a lot more issues than I initially thought! ▬▬▬▬ PCBWay ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ Sponsored by PCBWay: 🔸https://pcbway.com/g/lF253I PCBWay provides full feature custom PCB prototyping services, 3D printing, and much more. Check them out using my referral link above and get a 5 USD welcome bonus when you sign up as a new customer! Full-Color PCB Printing: 🔸https://www.pcbway.com/blog/News/Unlo... My contribution to the Community Project Space at PCBWay: 🔸https://www.pcbway.com/project/member... ▬▬▬▬ Affiliate Links ▬▬▬▬▬▬▬▬▬▬▬▬▬ Titanium Alloy Tweezers Professional Repair 🔸https://s.click.aliexpress.com/e/_Ddj... 7-45X Continuous Zoom Stereo Trinocular Microscope 🔸https://www.aliexpress.com/item/32880... AliExpress: Mechanic low-melt solder: 🔸https://s.click.aliexpress.com/e/_DDQ... AliExpress: Mechanic Solder Mask 🔸https://s.click.aliexpress.com/e/_Ddy... TOWOT Solder Wick from Amazon: 🔸US: https://amzn.to/3SyHrDB 🔸DE: https://amzn.to/3HFpCgJ 🔸UK: https://amzn.to/3OeIVRZ Solder Mask from Amazon US: 🔸https://amzn.to/43K8KOy (6pcs) 🔸https://amzn.to/470ISRw (4pcs + UV light) DE 6pcs: 🔸https://amzn.to/3Dr49WU 🔸https://amzn.to/43Av6lC 🔸https://amzn.to/44XIbGB FNIRSI HS-01 Soldering Iron 🔸https://s.click.aliexpress.com/e/_DE4... Flux for easy soldering 🔸https://s.click.aliexpress.com/e/_DFk... 🔸https://s.click.aliexpress.com/e/_Dlv... InfiRay P2 Pro Thermal Camera 🔸https://xinfraredx.com/products/infir... ▬▬▬▬ Support Bits und Bolts ▬▬▬▬▬▬▬▬▬▬ Patreon:🔸  / bitsundbolts   Bitcoin: bc1q2dvf9flf78lam33qjj9w9xgvfxdgre7g9x3rmw Twitter/X:   / bitsundbolts   Facebook:   / bitsundbolts   ▬▬▬▬ Timestamps ▬▬▬▬▬▬▬▬▬▬▬▬▬▬ 00:00 Intro 01:13 Reflow solder of 3Dfx chips 03:33 PCBWay 04:09 First test 04:42 No red color 06:00 Looking for faults 08:18 Replace bus switch 10:42 Second Test 11:20 Announcement & Conclusion