28 Apr
2004
28 Apr
'04
4:34 a.m.
Seth Lewin <sml49(a)comcast.net> wrote:
I had a somewhat similar experience with a Iici - there's something touchy
about the portion of the power supply circuitry that trickles a milliamp or
so of +5 to the logic board to enable startup. Also - does the fx PSU have
one of those push-and-lock-in power switches on the back? Iici's do and
sometimes fiddling with that will have a beneficial effect. Worth a try.
Eleven years ago, 1993, this was the reason I got on the internet. I had
a IIcx that didn't want to start. Over a few months it got worse and
worse. Until it wouldn't start at all anymore.
So I searched usenet and found that the IIci and IIcx power suppilies
were all failing in the same manner. Dead solder joints on the trickly
charge portion of the unit.
It said to take the PSU apart and re-solder every joint on the entire
circuit board. Because who knows which one went bad.
I did it, and the PSU has worked fine ever since!
--
tim lindner
tlindner(a)ix.netcom.com Bright
I would take everything out, memory, drives etc., use
a known
good apple brand mouse and keyboard and see if some minimum
system doesn't get some kind of response. ADB, SCSI, and
memory can all look like this IIRC.
I thought the fx required memory to be present to boot? So far my minimal
system has been system ROM/memory/known good kb/rodent but I still don't get
+5V on the ADB cable to the keyboard or anywhere on the motherboard
connector.....it's looking very dead-PSU-ish now.