At 10:14 PM -0400 9/20/2010, Midnight rider wrote:
Rev. A iMac G5 20" 1.8Ghz.
My iMac G5 kicks it's fan on HIGH whenever it starts up, but only
before it boots on the Apple logo. once the Apple logo appears, the
fans die down. This is only happening when the system has a question
mark on a folder, or when it is in target disk mode, or when it is
choosing a disk to start from.
Fans are reved high when the Power Manager doesn't know what's going
on... it's a safety feature, so your Mac doesn't cook itself
accidentally. Add to that the "question mark folder" -- the
inability of the bootstrap to immediately find a valid boot volume...
You're having problems with your parameter ram (nvram).
First, try zapping the pram (boot holding down cmd-opt-p-r), then
reset the Energy Saver and Startup Disk settings. If either symptom
persists, replace your PRAM/Backup battery.
And run a Veirfy Disk pass on your boot volume with Disk Utility -
make sure it's clean.
- Dan.
--
- Psychoceramic Emeritus; South Jersey, USA, Earth.
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