[Todd Madson]

So I get home from work last night and open the door and I think I hear what sounds
like someone vacuuming the house. But no-one is home. Uh oh.

I get to the computer room and it's my G5 - we had a storm in the hour before I got
home so I wonder if the power fluctuated?

The CPU is totally frozen up and all of the fans (all nine of them) are HOWLING like
there's no tomorrow. It's almost the same sound the IBM dual Xeon rackmounted
servers at work do when they lose a power supply - just deafening.

I rebooted it and everything was just fine after that. I wonder if there was a bit of a
brownout in the neighborhood and the Mac panicked.

Looks like it's working fine now but I've had the machine a little over a month and
it was the first time it did something like that. Bad storms in the area though so I
am not totally surprised. Anyone else experience this?

[OreoCookie]

It's a safe-guard. The fans are controlled by the OS, so if the OS freezes, they turn to full speed just in case your cpu load is maxed out.

[Madrag]

it used to happen to my PM 2.0 with OS 10.3, but now that I upgraded to 10.4, it almost never fires up...

(BTW, to hear the nine fans again, try the hardware test - booted from the CD - now that's vacuum like