I've got an old SE/30 (8MB RAM, System 7.1, external color monitor)
which had been, until a few weeks ago, running quite happily. However,
it abruptly began to crash whenever I brought up the standard file
selector (in the 'Open...' or 'Save As...' dialogs for any application.)
Figuring there was some problem with my System Folder, I tried
re-installing 7.1 from my master floppies, with no extensions.
It still didn't work.
I couldn't think of anything I'd changed to make the system suddenly
fail; the only System Folder alteration I'd made lately was to install
the most recent Scrapbook, and I quickly ruled that out as the cause.
I've tried wiping the hard disk (and reformatting with the
latest Apple HD SC Setup 7.2.2), running without the monitor card or
external SCSI devices, with 32-bit addressing on and off, booting from
external hard drives, etc. Nothing seems to work.
Oddly, MacCheck, Help!(1.0.9), Disk First Aid, etc., can't find anything
wrong. This acts as if it's either a problem with my master copy of
7.1, or a problem with my ROMs. However, wouldn't either one of those
show up in at least one of the diagnostic programs?
Indeed, even if I boot from a floppy I get the same failures. If I boot
from system 7.0.1 or 6.0.7, the system works well enough to use, but I
get sporadic crashes (often with garbled errors messages such as "The
application 'unknown' has unexpectedly quit, Data." ("Data" being the
name of one of my disk drives.) If I'm not using 7.1, this acts like a
transient hardware problem in that the failures are of various kinds and
they happen randomly. But under 7.1 it's quite repeatable.
If anyone out there has experienced a similar problem, or has any clue
what's going on, please help. I'm at my wit's end trying to figure out
if this is a hardware, software, firmware, or whatware problem.
I'm tempted to run right out and get a Quadra immediately, but if this
turns out simply to be something really stupid I've done to the system
software (on all my copies of it? all versions?) I'd probably regret that...