Ben wrote -
> Do they age with use, or simply age as humans, even
> if they do nothing?
>
> This specific PB 100 has been used intensively for
> 4-5 years
> (1992-1996) then it was replaced by newer models and
> I just switch it
> on once every other month.
>
> In the last 8 months it has been continuously
> plugged.
>
> BTW. I have a spare LCD with the whole thing so will
> try to see.
>
> Ben
Let me try this again (got bounced)...
>From what I've found, most of the screen problems
associated with the PB100 have to do with those bad
caps... but even the sources I've found are
inconclusive at best. I have yet to actually read of
an instance where replacing the capacitors has been
done; either they've done it and had a modicum of
success and simply haven't posted the data or they
haven't, most likely.
Why these things deteriorate is beyond me. The one I
was gifted with had sat in storage for a number of
years. The owner assured me that it had indeed worked
before it was packed away. Now, it doesn't. I removed
the screen, and sure enough, the capacitors had
leaked. The way you can determine this, by the way, is
to take the screen out, flip it around and look for
the two rows of little tiny black cylinders, four per
row. Look at the board beneath them. Does it look like
there's an oily residue on it? If so, they leaked.
This is where it gets puzzling. As we've read, there
have been PB100 users who've managed to acquire
replacement screens and have had the same run of luck;
even right out of the box, they are dark. This has led
some of them to assume that there is a problem on the
logicboard end of the computer. They may be right. So
far, though, everything I've read points to those
pesky capacitors. One person reported that washing the
board helped. I tried to contact them, they never
responded, so please, dear citizens, do not try that
at home.
I can't help but feel that somewhere in some long lost
TIL there's info about this. Surely, our friends at
Cupertino had to get some complaints. Of course, since
the machine is no longer supported, that may be moot.
When I find the courage (and the parts), I'll try this
and share the experience with my friends here.
Meantime, try that replacement screen, see if perhaps
it's managed to avoid this bug.
Rob
Robert Little
Astronomy & Space Artist
"I have loved the stars too dearly to be fearful of the night..."
Sarah Williams
"The Old Astronomer to His Pupil"
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