Just joined here after acquiring my IIci. Click to expand... Because before, you wouldn't have been allowed. ;D

check for dust in the heatsinks. Also, you may have to reapply CPU Grease, that may be the main issues if it's not dust when there is overheating

Any DSDD (Double-sided, double-density) disks should work. Click to expand... Exactly. Sectored-ness (hard or soft) is irrelevant in the Apple's case. Just avoid HD ('High De…