Ivory CPU Heatsink and Instability
One of the theories about the instability of my Symbolics XL1200 is that the CPU has no heatsink and so it is suffering from thermal problems after a while. (15-30-ish minutes) David K. Schmidt was … »
XL1201 Moment of Truth
UPDATE: No joy. Still self-reboots. So, I put the Merlin II card back into the XL1201, connected the power and console, and powered it up. Nothing. Blank screen (which means the monitor was at least … »
XL1201 Merlin II Chip Reseating
UPDATE: I clipped and removed the broken capacitor. Replacing it will be the task of another day. I spent two days removing, cleaning and reseating each DIP chip on the Symbolics XL1201 Merlin II Main … »
Broken SCSI Pin on XL1201
Well, I was installing a new hard drive into the XL1201 today and just before I connected the SCSI cable, I noticed a pin seemed to be missing on the 50-pin SCSI male connector on the backplane. On … »
Repairing Symbolics 3600 Keyboard
When I purchased the XL1201, it came with a Model 3600 keyboard. Unfortunately, several keys didn’t work, including both hypers, and the left control and super. I disassembled it and … »