General Category > Lisa Troubleshooting and Repair
Restoration of a Lisa 1
snuci:
Okay, so I remove all chips and connectors and used contact cleaner. Now I have lower Twiggy drive working. I was able to make two floppies and wrote Lisa Office System I and II from Bitsavers. While my upper drive gives 1A (Unable to Find Calibration) errors, it did try to format three tracks when first accessed and then has given this error in BLU since.
I was able to install LOS on an X/Profile but it uses the upper drive for "disk 2" when you start LOS from "disk 1" and you attempt to install LOS on a Profile. Oddly enough, the upper drive sure looked like it was working and the installation completed with no errors but there are no apps in LOS except for the clipboard and preferences. Does Lisa Write, etc normally get installed? Could my upper drive have worked or did it just silently give up copying files from that disk and complete with missing files?
Trying to boot from the LOS disk 1 in the upper drive gives me an Error 45 (Bus error?) but I did turn off my X/Profile to try to boot from the floppy. Any experience with this and advise would be appreciated. I will try cleaning the drive and rechecking the ICs/connections.
stepleton:
The Office System tools (LisaWrite, etc) come on separate disks. You can find them here:
http://bitsavers.trailing-edge.com/bits/Apple/Lisa/twiggy/
Note that these disks may be serialised to a different Lisa, and while the disk images are probably deserialisable using something like the usual editing procedure for 3.5" diskettes, I'm uncertain whether anyone has tried it.
I've never encountered any mismatch of upper and lower drives on my Lisa. Is it the case that the ROM correctly identifies the upper drive as Drive 1 and the lower drive as Drive 2, while the Office System gets it backward? (In other words: are you sure your cables are installed the right way round? :D )
stepleton:
Ah sorry, I misunderstood---the installation procedure was just referring to the other disk drive as the "second drive" or something. I think this is normal :)
snuci:
With both Twiggy's I have one working and have narrowed down the other to having an issue with the bottom board. If I swap bottom boards, the bad drive is fine. I'll have to start swapping chips to see where the issues lies now. That is time consuming but needs to be done. Perhaps I'll start by swapping all chips from the good bottom board to see if that fixes it and then take it from there. It might also be the axial caps but I usually don't see those type going and they look visibly okay.
stepleton:
As a computer scientist I have to recommend doing a binary search among your chips :D
For your sake I hope that this is the problem, although there are plenty of other things that can go wrong. The good news is that virtually all the ICs on the digital board are commodity parts that are widely available even today.
PS: How difficult was it to remove the drive belt from the spindle? I've never attempted it.
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