Thanks to all who helped me with the SUMOUT issue.
For a variety of reasons, I bit the bullet and bought a hardware,
external modem. Since doing so, I haven't had any problems (in fact,
I had no problems after posting my first message, so it may have been
something transitory involving the power supply).
I also opened up the machine this past weekend and cleaned out some
dust, in addition to removing and reinserting the memory, which had
become slightly loose at one end. I also fixed the plastic
air-directing device over the CPU, which was a little loose and
causing some annoying noises.
I don't know which issues, if any, were the problem, but I ran the
machine through a 24-hour test after cleaning out the case and it
passed.
Thanks again to everyone who gave me advice, and also to those who
gave me advice on modems several months ago; having a hardware modem
makes a BIG difference for a lot of things. I did have some problems
with dropping connections to start out, but I then realized that
turning the modem off when offline to allow it to clear itself helped.
Also, on noticing that the bottom of the modem was hot after half an
hour of use, I simply elevated it astride two CD jewel cases, which
has eliminated that problem from consideration.
Nathan
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