Sharp-eyed experts will note that I have asked almost the same question previously. However, the old solution does not work this time, so here is the issue again:
When I boot my Performa 475 it goes through all the usual startup stuff with extensions, etc. The wallpaper displays, and the standard finder menu appears at the top, but then it gives up. None of the menus work; none of the desktop icons appear; the cursor is present, and moves, but I can't do anything other than boot with the 3-finger salute.
I have booted without extensions; zapped the PRAM; rebuilt the desktop; removed desktop preferences; run Disk First Aid. Nothing seems to help. The system boots fine from CDROM, and the boot volume mounts OK. I can get to the system folder and change whatever I need to change, but don't know what else to do. Last time this happened, I was able to remove some junk from the Preferences folder and get it going, but not this time....
Any other ideas?