The link you sent is the one that I used. I confirmed the accuracy at
Apples website. Anyway, I tried jumpering the PWR ON pin with a GND
like you recommended. While jumpered, all the fans powered up, and a
red light on the motherboard came on. However, there was no startup
chime. If I removed the jumper, everything powered down. Pushing the
power button accomplished nothing, whether or not I waited a minute,
and whether or not it was while the PWR ON pin was jumpered to a GND.
There is always the possibility that the motherboard I got or processor
are bad. But, in the mean time, I will still try running the proper
24V (OK well proper enough) to the board, to see if that works, but I
have to wait several more days now to get this computer up and running.
Quite annoying.
Any possibility that the front power board from the QuickSilver case
isn't compatible with my rev 1 Digital Audio board? I tried the one
from my Sawtooth with the same lack of results (though I didn't try it
with the jumpered PWR ON pin). And since I mentioned this is a rev 1
DA I might as well mention that I do have 12V fed to the 4th mount
point of the processor.
Thanks for any help
Chris P
-----Original Message-----
From: Joshua Coombs <[EMAIL PROTECTED]>
To: G-List <[email protected]>
Sent: Thu, 12 Jan 2006 19:38:16 -0500
Subject: Re: [G] Using 12V instead of 28V in Digital Audio, Gigabit
Ethernet etc.
----- Original Message ----- From: <[EMAIL PROTECTED]>
To: "G-List" <[email protected]>
Sent: Thursday, January 12, 2006 18:58
Subject: [G] Using 12V instead of 28V in Digital Audio, Gigabit
Ethernet etc.
Hello all. I finally got my Digital Audio motherboard, installed it >
in my QuickSilver case, and installed the 2 drives I had from my >
Sawtooth. I am using a modified ATX PS (the same one I used in my >
Sawtooth). Now, I was told that instead of running 28V (or 24V or >
25V) to the board, I could just use 12V and the machine would boot. >
However, I did this, and the machine does not boot. It does >
absolutely nothing when the power button is pressed. Everything is >
hooked and wired up properly, so the only reason I can think why > this
is not booting is that 12V is not acceptable and I actually do > need
24V. And my battery has the proper 3.6V so thats not the > problem.
I was told the consensus (I forget by whom) was 12V would work. I >
would like to know how this consensus was decided and if anyone has >
actually had success using 12V instead of 24V.
Thanks for any help
Chris P
I ran my DA using 5v on the 24v line for a short period of time to test
the theory. I don't recall where I got that info from, but it did test
out ok.
Couple things to do.
First, verify that you have disconnected +5vsb line, as the DA doesn't
use it. See
http://www.outofspec.com/frankenmac/wire.shtml to see what I'm
referring to.
Once you've done that, if it still refuses to light, plug everything
in, and use a paperclip to short the PWR On line to ground. This will
turn on the powersupply. Give it a min to settle, then hit the power
button on the mac.
Joshua Coombs
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