From: bauer@informatik.uni-ulm.de (Christian Bauer)
Subject: Re: MacPlus freezes after ~1 hour use, fails to boot
Nntp-Posting-Host: christian.informatik.uni-ulm.de
Organization: University of Ulm
Lines: 27

In article <1osu69INN11r@tamsun.tamu.edu>, mclean@math.tamu.edu (Robert
Mclean) wrote:
> 
> My MacPlus is having problems which seem temperature related. After using
> it for a while it freezes. The when I turn off then on, the screen doesn't
> show the disk icon, and then goes dark. I consulted Larry Pina's Book and 
> could not find these symptoms. Has anybody else seen such symptoms?
> Suggestions?

Shure it is temperature dependent, but this does not clean all your
problems.
Based on some exp. I must say that the connections between the power supply
and the Monitor and Main Board are usable to this failure, Ram simms can be
badly connected due to some corrosion and the powersupply can be in the
last
phase (lower Voltage).

So you can do following if you are used to such technical terms.
1) Clean all mentioned contacts with contact spray
2) readjust the 5 Volt level of your powersupply
3) use a calm fan and think of preventing dust blowinÔ through the floppy!
   (a fixed piece of paper can prevent this)
if you don't know how to do it beg a friendly technician!

Christian Bauer

bauer@informatik.uni-ulm.de