Apple Lisa 1 - restoration project

David W. Erhart wrote: I also have a (non-functional) Lisa 2. If those are Ni-Cad batteries, it's battery alkali, not battery acid. At least, I think that's correct -- do reply if I'm wrong! In photo DSC05355, we can clearly wee that a SIL resistor pack has peeled open next to the batteries. That'll need to be deolsdered and replaced. It's marked "750-81-R10K", which I think means it's a 10K pack, but of course you'll need to figure out whether it's a bunch of separate resistors or a group of resistors with a common connection (I'd guess that the latter is more likely). Then there's all that green corrosion on the PCB. See if it'll brush off with a dry toothbrush (an old one!) and then check for broken PCB traces and/or IC pins. All the ICs in that area are very clearly labelled and there's nothing unusual that I can see there. Diode D6 is very messy, but it might all just clean off. You'll need new Ni-Cads, of course! The old ones are date coded 8336, meaning 1983, week 36. Are they AA size? If so, maybe best to desolder them and fit replacements in a separate battery holder. Those photos are making me want to go and open up my Lisa and check... -- John Honniball coredump at gifford.co.uk