#A500 PS Problems?
Hi all,
I have a small problem — I was getting lots of snow on my screen today (am
using an Amiga A500 with no peripherals connected, 1MB of RAM). I
disconnected the power supply (after turning everything off, of course),
and then plugged it into the wall and tested the output from the other end.
It read +6 volts for the +5 volt output, +13.5 volts for the +12, and -11
for the -12. I opened the little monster up and adjusted the -11 up to -12
(no load). Should this help the snow at all? The snow shows up whenever the
floppy is accessing, or in particular when the mouse use is heavy, and at
those points the power supply puts out a kind of high-pitched wheedling
sound (steady, quiet "wheeeeeee" tone). Could the snow be due to brownout
conditions (lots of air conditioners on in the building today). Should I
replace the brick with a third-party equivalent? Are the +6 and +13.5
voltages due to absence of load from the computer's circuits? Any help on
all this (fast!) would be muchly appreciated — thanks!
–steve w.