[G4] Sawtooth cycles on-off

[Harry A Freeman]

WOW I've never heard a CPU, what does it sound like.
Mine doesn't make a sound. I think that you must mean
1) A Fan
2) Hard Disk Drive
3) Power supply

If you CPU has a cooling fan then perhaps it is being controlled by  
the temperature of the CPU.
Tell us what it sound like. There is a small application that will  
tell you the temp. of the CPU however I've forgotten what it is  
called. Perhaps someone in this group remembers the name and will post.

Cheers

Harry
San Jose, Ca
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On Apr 15, 2009, at 5:07 AM, Peter Webster wrote:

> Dear Wise-List:
>
> My 500GHz Sawtooth, 1 GB sdram, OS 10.3.9, external LaCie FireWire  
> 120GB, esternal Maxtor USB 160GB, 17" flat Studio monitor, is  
> sometime cycling on-off.
>
> The "on" button on the computer case stays lit, I can hear the CPU  
> powering down, then up, then down, and last time, the monitor went  
> dark and I had to pull the plug.
>
> When I booted up today: all OK.
>
> Ran Disk Utility and TechTool Express: all OK.
>
> What is going on?
>
> I have everything backed up to the 2 external drives, but still:  
> this is a resuced unit, all thrown out (!) and it has worked  
> flawlessly for 2 years, and I want to keep it up and running until  
> it is glowing plastic dust.
>
> Thanks!
>
> PMW
>
> -- 
> peter m. webster
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