I've got this Mac SE that I rescued. When powered up, it will display the Happy Mac face, then demand a bootable disk.
It's got a 20 meg SCSI hard drive, 1 meg of RAM, and an 800K floppy drive. I've got another not-as-old Mac (G3/333, System 9.2.2) for the time being, and I used it to format a standard 1.4 MB floppy disk as 800K (had to cover the extra hole), then used Disk Copy to copy the contents of the System 6.0.8 disk #2 (from Apple's archive) to it. When I try to boot the SE off this disk, it will quickly spit it back out and continue to demand a bootable disk.
I don't have the necessary tools to crack the case open.
Any suggestions to get this old thing working? It's just something to do in my spare time.
edit: I did try to clear the PRAM and that didn't help.