On 3/13/10 7:47 PM, John Carmonne wrote:
On Mar 13, 2010, at 3:51 PM, John Carmonne wrote:
Hi All
I have a G4 Cube 450 that shuts down and or reboots for no apparent
reason, also it has problems seeing some firewire drives that all
the other PPCs have no problem with. Is this an indication of a
logic board on the bum?
I have just run Apple hardware test and all says OK. IHas anyone else
had this problem. The machine seems to be kinda unstable. Does anyone
know if RAM can do this?
Yes, RAM can cause various problems. But for it to cause random shut
downs or restarts would be unlikely.
A controlled shut down or restart (applications quiting, the desktop
depopulating) would be a software issue. Uncontrolled shut down or
restart (screen blanks all of a sudden and the computer is off, all in a
matter of a second) are either logic board or power supply. As usual
the easiest way to debug it is to swap equipment around.
How often does this occur? Is it reliable (does it always do it within
a certain amount of time)? If it is you could try removing as much
hardware as possible most or all RAM, HD, video card, etc then see if it
still happens within the usual time. If it doesn't then it's possibly a
power supply problem. If it does then it could still be either.
--
Clark Martin
Redwood City, CA, USA
Macintosh / Internet Consulting
"I'm a designated driver on the Information Super Highway"
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