12 May
2006
12 May
'06
2:29 p.m.
Friday, May 12, 2006, 9:07:55 PM, you wrote:
The problem is I need to use a PC power supply
(AT-class with it's own
power switch) as a 12V power source, and the only one I have access to
needs a minimum load of 3Amp on the +5Volt line.
That reminds me of some troubles I've had (or still have) replacing a
dead PSU in a vintage 4D/20 or 4D/25 ("SGI Personal Iris"). I've cut
out the old exsiting PSU and rewired an old switching PC supply in an
appropriate manner. Without drives the frankenIRIS works as expected,
but as soon as there is a drive attached to the internal power circuit
I end up getting a more or less purple display and a machine hanging
during POST. Well, time to get a 300-400W PSU I guess, as there is
probably a line running with less than enough power supplied to it by
the cheap PC PSU. It's old 5.25" SCSI drives, so probably 12V is the
source of the trouble... right?
--
Best regards,
Gerhard mailto:mail at g-lenerz.de