Spent a few hours last night working on my ThinkPads -
A) Tried to install BeOS R5 on the 560E - no dice, the machine does not seem to boot off PCMCIA ATAPI, and the boot floppy does not seem to support PCMCIA CDROMs - have to find an alternative way to get the machine to boot.
B) Tried to install OpenStep 4.2 on the machine - also no dice. The drivers support PCMCIA SCSI but not ATAPI, so that’s a no-go with the CDROM drive.
C) Looks like the ThinkPad T21 developed the BoD/blink of death issue (known fault on the machines). I think I’ll need to take it apart and check the ADP3421 power regulator chip to see if the power-good pin (pin 16?) is coming in within spec. *ugh* - time to look into SMD component level repair with a hot air pencil setup.