25 Nov
2001
25 Nov
'01
4:01 a.m.
On Sunday, November 25, 2001, at 04:43 pm, classiccmp-digest wrote:
From: Jeff Hellige <jhellige(a)earthlink.net>
Subject: Lisa Success.....finally...
Well after working on it off and on for over two years I
finally got my Lisa to actually boot up tonight. I've been trying to
put it back to Lisa2 specs vice Mac XL and I had swapped a 400k
floppy back into it in place of the 800k upgrade that had been
peformed. Unfortunately the machine would never power on properly
without the XL screenkit installed. Finally tonight I said the heck
with it and reinstalled all the parts to the XL screenkit and powered
it on, attempting to boot from Macworks XL 3.0 and the Macworks
System Disk (Mac Finder 4.1). It worked! Both disks were 400k disks
and made from images gotten off of the web. I'm tempted to put the
SCSI card/drive back into it and see what I can do with it, though
it'd be nice to still figure out what's going on with the
original-style CPU card and video system and get it working as a Lisa
again.
I'm looking forward to performing similar surgery on my Lisa 2/5 with
screen mod kit installed. A couple of questions:
1. Did you disconnect the screen transformer that goes between the video
board and yoke cable? An obvious question but thought I'd ask.
2. Did you just swap the cpu board with screen mod ROMs for a standard
Lisa 2 board, or have you tried putting your Lisa 2 ROMs in the board
that you know works?
3. I understand that you need to tweak some of the potentiometers on the
video board and possibly the psu. The Sun Remarketing DIY guide to Lisa
repair has a section on installing the screen mod kit, so removal should
"simply" be the reverse of that procedure... My understanding is that
the Lisa will boot with incorrect voltages but the display will be
distorted.
4. What symptoms were displayed when you tried booting without the
screen mod kit?
Phil