I'm not sure what this stuff on the R31 is.
The XL1201 Backplane's SCSI connector has one broken SCSI pin (#1, a ground) and a broken left side. It seems to work adequately d…
Image of the area and tools used to repair five bad solder joints on a Symbolics 3600 keyboard.
Symbolics Model 3600 keyboard, PCB, key 82 (right control) - seems to have a bad solder joint.
Symbolics Model 3600 Keyboard, PCB macro photograph, key 80 (left super)