The G4 died, 6 weeks later, I have (thanks to the generosity of friends) a "new" Mac. a dual processor G5.
So, just had some fun with it. I changed out the Nvidia video card for the Radeon 9600 Pro video card in the G4. I also installed the old Sonnet USB/FireWire PCI card I had in the G4.
Now, the video card has its own slot at the bottom of the stack of slots. The card also has a metal shield that was dangerously close to some solder joints on the underside of the USB/FireWire card.
I slapped some duct tape over the solder joints, trimmed off the excess and installed the card.
(Yes, I could have installed the Sonnet card in another slot. I still would have had a slot I couldn't use, due to the potential of a short between the video card and whatever card was installed in the neighboring slot.)
Startup chime and then... nothing. Crap! Change out the card for the Nvidia. Reboot. Chime. Nothing. Hell! I KNOW I observed all safety precautions.
OK, work the problem. The computer booted WITH the Nvidia card. What changed? Aha! The USB/FireWire card. Pull the card. Reboot. Chime and boot to desktop.
As I'm setting the Sonnet card aside, I noticed that some of the tape is covering some contacts on the other side of the edge connector. The side I never looked at when I was trimming the tape.
Trimmed that little bit of tape. Installed the card. Reboot to desktop.
AHA! Install Radeon card. Reboot to desktop. USB/FireWire card works. Video card works. Heart starts working.
Really, I am getting too old for this sort of thing.