I’ve got a Macintosh iisi that turns on and chimes. It will output either a grey, yellow or purple screen for a second then the monitor will turn off. With no ROM it will stay on a solid color indefinitely. It also does seem to boot off a floppy disk and the cpu does get warm. It seems like a video issue of some sort but not sure where to look for bad traces or vias. I have done a lot of work on this board already with trace repairs, but still no luck. About to call it quits on this machine. Any ideas?
Macintosh iisi, video for a second then no video
- Thread starter Duke09
- Start date
I’m comparing your board versus mine in the IIsi restoration I wrote about here. I see you have the ROM SIMM instead of the onboard ROM, and you had the same trouble areas at UA5, UA6, and UE5 that I had due to corrosion from cap goo. My suggestion is to double-check your work at UE5 and make sure you have good continuity and no shorts to UA2 and UA3. Good luck!
Thanks for the suggestions. I spent a few more hours and found two more bad traces from the ROM to the CPU, and I assume the damage is under the ram slots. I tried fixing those two but it made things worse somehow. At this point I have spent too much time on it and will just part the machine out at this point.