belzrebuth
Well-known member
I was a given a IIsi in a pretty bad state, the battery has leaked damaging the CPU IC (corroded leads which instanly broke upon touch) and several corroded traces throughout the board.
I've cleaned the board the best I could and repaired a couple of traces they were apparently damaged.
I also replaced the CPU with one I found on eBay https://www.ebay.com/itm/392523139565.
The power supply has also been recapped and capacitor leakage cleaned but I couldn't get it to power up so I wired an ATX power supply to check if the mainboard actually works, and it doesn't! I get no bong chine upon power up.
I don't know if the CPU replacement is actually real/working or if there are still any damaged traces on the board but I thought I could ask a few questions first.
So my questions are:
1) Do I have to have a battery connected to get video out?
I guess the absence of a bong sound at power up indicates there's a problem elsewhere but I thought I'd ask anyway.
2)Some capacitors are still missing, could this be causing a no-bong/no-video situation?
Do all capacitors need to be installed in order for the machine to boot?
3) Has anyone replaced the CPU on a IIsi or another machine with a questionable replacement?
If so, did it work?
I've cleaned the board the best I could and repaired a couple of traces they were apparently damaged.
I also replaced the CPU with one I found on eBay https://www.ebay.com/itm/392523139565.
The power supply has also been recapped and capacitor leakage cleaned but I couldn't get it to power up so I wired an ATX power supply to check if the mainboard actually works, and it doesn't! I get no bong chine upon power up.
I don't know if the CPU replacement is actually real/working or if there are still any damaged traces on the board but I thought I could ask a few questions first.
So my questions are:
1) Do I have to have a battery connected to get video out?
I guess the absence of a bong sound at power up indicates there's a problem elsewhere but I thought I'd ask anyway.
2)Some capacitors are still missing, could this be causing a no-bong/no-video situation?
Do all capacitors need to be installed in order for the machine to boot?
3) Has anyone replaced the CPU on a IIsi or another machine with a questionable replacement?
If so, did it work?