Just picked one of these up locally. Starts to read Epson DOS 2.11 boot disk, it posts "Equity Loading..." for about a 1/2 second and then poops out with "Non system disk or disk error.." Any other working DOS results in "Boot Failure" and the computer locks up. The dip switch settings appear correct. I tried flip-flopping the disk drives and connections to the motherboard. No luck. The drive connectors are not your standard IBM PC drive connectors so I can't try any other drives. I have used a high % iso alcohol to clean the heads. Disk controller embedded in motherboard. I don't really feel like taking the whole computer apart to get to the motherboard. Do you think it's worth trying to fix? I feel like I am restoring an 86 Corolla, not worth it...Comments?