3 Apr
2011
3 Apr
'11
10:51 a.m.
--- On Sun, 4/3/11, Steven Hirsch <snhirsch at gmail.com> wrote:
I cleaned things up enough to get the self-test and
startup
to run.? The DB-9F mouse connector is effectively
destroyed from the battery electrolyte.? If I wiggle
the connector the mouse is operational, though. A good
sign.? Not looking forward to pulling the old DB9
right-angle connector from the motherboard...? This one
is too far gone for cleaning and will definitely need to be
replaced.
Fortunately, right angle DB9 plugs are readily available. But yeah, desoldering that is
going to be fun :D
At the end of the internal self-test (everything
passes!)
it complains that the keyboard is not plugged in.? I
get this result with both keyboards.? Is that the
symptom of dead foam disks?? Somehow I thought it would
still know a keyboard was out there, so perhaps this is
something else altogether.? There was so much corrosion
on the edge connector at the rear of the CRT cage that it
could simply be bad contacts at that point. Will have to
start checking continuity.
It could very well be corrosion/tarnish on the edge connector, or at the 1/4" phono
jack on the front of the computer. But, I'm actually thinking it might be the foam
discs in the keyboard. You will also get that error if you hold down any of the keys while
turning on the computer. Therefore, if those little mylar discs have fallen off the foam,
and are laying on the circuit board contacts, you could have the same effect. Try holding
the keyboard upside down and shaking it, then turning on the computer with the keyboard
upside down (and no keys pressed).
The one ProFile drive that comes ready tries VERY hard
to
boot, but eventually fails with an error 10707.? This
is after a considerable amount of access, so something is
almost alive there!
That means "system software damaged". The "fix" is to boot from Lisa
Office disk 1, and do a repair. Of course, you'll need to disassemble and clean your
floppy drive, since it's sure to be gummed up and frozen with grease. The metal eject
mechanism comes off easily (four screws from underneath, one jesus clip on the eject
motor), so you can easily WD40 it to dissolve the old grease.
If you need software, it's readily available in the form of DiskCopy images. Remember
- use DiskCopy 4.2, not 6.3. Any older Macintosh with a built in floppy drive can write
Lisa disks, although a Mac running System 7.5 or older is usually preferred. The use of an
800k or 400k drive to write the disks is not required - the Macintosh 1.4mb drives work
fine too.
-Ian