tezza wrote:Whoo hoo, a Lisa 2. Is it a Lisa 2/5 or Lisa 2/10 (Mac XL). They have different CPU boards.
When you say the motherboard, do you mean the smaller horizontal board with the slots (the motherboard in the Lisa) or the CPU board, which contained the battery? Usually it's the CPU board that's destroyed although if it's bad enough fluid can also drip to the motherboard.
I've played around with Lisas. The articles are on the blog site under Apple Lisa heading.
You might also be interested in this one
http://www.classic-computers.org.nz/blo ... s-lisa.htm
Happy restoring! Do you also have a Profile or Widget to go with it?
My "spare parts" Lisa also has a faulty motherboard so I can't help you there.
How do you know the CPU board has survived? Just from a visual check or do you know someone with a spare machine you can swap the board into?
The floppy drive issue
I'd cleaned up the Sony 400k 3.5 inch floppy drive even before I'd started serious work on the 2/10. Sticky drives are common with old Lisa 2s and it doesn't hurt to give them a good clean before shocking them out of retirement.
With the Lisa passing all checks, I left the widget unplugged and tried to boot off this cleaned and regreased floppy drive. Hmm..the floppy drive didn't spin the disks. Actually it did spin the disk, BUT only if the spindle was in certain positions prior to a disk being inserted? Then it managed to load software..but only sometimes and very slowly. Clearly there were a lot of read errors going on.
After A LOT of investigative work (assisted by Tony Duel of the Classic computer mailing list) which included replacement of the TA 7259 motor IC and associate capacitors the problem still persists. Tony feels the fault lies within the spindle itself with the hall-effect devices. Interestingly the 400k drive from the parts-only Lisa (my third Lisa) has the same problem!"
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