Date: Sat, 10 Sep 2005 20:01:11 -0500
From: Jeff Grant <[EMAIL PROTECTED]>
The IIci has the Astec power supply, and I think you're right, it may
be getting quirky. I have a bit of other odd behavior though. I was
under the impression, (but could be totally wrong) that the Quadra 700
power supply would work in the IIci being the same form factor with
same listed voltages. When I try my Quadra power supply in the IIci,
the light flickers again, but won't power up. This happens if the PDS
card is in or removed. Nada happens. When I put the PSU back into
the Quadra, the 700 boots up just fine. It happens to be the GE model
from the 700. When I put the IIci's original Astec back in, it boots
up fine if no PDS card is in, as I described before. So maybe it is
the mobo?? Maybe both . . . hmmm. Oh yeah, I live in Fredericksburg,
Va.
There is a fairly common failure of the IIci motherboard which
interferes with powering up. Many of the surface mount capacitors
are in the vicinity of the power-on circuitry on the motherboard and
when they leak corrosive, that's the circuitry most likely to be
damaged.
You may wish to pull your motherboard and examine the rear right
quadrant for discoloration--slightly darker, hint of brown.
My IIci had this failure. I ended up bypassing a motherboard trace
with some wire, because one of the vias through which the trace
passed was corroded completely. I also cleaned the motherboard and
replaced the caps.
You might try your IIci PS in the Q700 to see what you can see.
The two power supplies should be interchangeable. However, the
current required to power up might be different and that could be why
one power supply come on and the other doesn't. If the MB is
delivering below spec. one PS may have more head room than the other.
Other compatible power supplies include IIcx, IIci, IIvi, IIvx, Q700,
C650, Q650, 7100.
The PRAM battery is irrelevant to powering up on these models.
Jeff Walther
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