Error 75 relates to the Widget hard drive. Have you completely disconnected the Widget and tried to boot from a floppy without the hard drive attached? Try that if you haven't already, I'm not sure if you are ware but there's a trick to booting from floppy while the Widget is in there. You press a key at a certain time in the boot process but to simplify things, just disconnect the Widget and try to boot from the first Lisa 7/7 disk..