From: "Adrian O'Sullivan" <[EMAIL PROTECTED]>
Date: Sun, 07 Aug 2005 10:31:17 -0700
Thanks, guys, for the (as always) welcome suggestions. The good news
is the
S900 is up and running again normally ('nominally' I believe they say
at
NASA)
Great news glad to hear it!
The bad news is: there must therefore be something wrong with either
the new
G4 chip and/or the used ZIF carrier card upon which it resides.
Maybe yes maybe no .
I don't think I have a RAM, NVRAM, PS, or board problem, as the
computer is
working fine with the G3.
RAM ,NVRAM or software issues would be high on my list for checking out.
Did you try the G4 with no cache software installed? The G4 will run
with no software though slow. With the wrong software version for the
Mac OS your running it may behave just as it has for you. RAM which
works fine with a G3 may not work with a G4 especially a fast G4 . When
i went from a G3 350 in a carrier card to a G3 500 I had to remove all
my old 8MB RAM chips which had come with the machine . The 70ns RAM
just wasn't up for the speed. I would have bought a new machine or at
least a motherboard if i'd had more money at the time. Being short of
cash kept me working at it which found a nearly free fix. Well not
really free once I replaced the RAM that no longer would work at the
faster speed. The G4 upgrade from XLR8 with a Carrier card I again lost
a RAM chip that was weak or a bit out of spec. Also took booting with
no cache software to get it to work. Gary @ XLR8 was kind enough to
provide a newer version of the XLR8 software which then fixed things up
right. The powerlogix software which had worked well with the G3 & Umax
machine crashed with the G4.
So, what should I do with the G4? I suppose I'd better clean it up
thoroughly. Regrease and reinstall the heat sink. And try again. Or
does
anyone have any bright(er) ideas?
Are you sure the dip switches are set correctly on the carrier card and
at standard cpu & bus speed to start with? XLR8 cpu's come with jumper
pins that override the settings for top 4 (#9,10,11 & 12 ) pins on
carrier card. A wrong setting can keep your machine from booting. What
is the cpu speed of your G4 ? Let me know and I will make some
suggestions on what should boot.
BTW, there is a little green light on the ZIF carrier card that blinks
rapidly after attempting to boot until shutdown, even though I have the
black screen. Is this a good sign? Does this mean anything at all?
Adrian
The green light means the carrier card is running . So it shows the
card is powered up. Off list replies keeps the rest of us from learning
what to suggest to others in the future. Best of luck Will S
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