iBook that Freezes?

[Ashley Aitken]

Howdy All,

We have one of the last iBook G4 models that recently started  
freezing solid (pointer won't move) a few minutes after boot and  
needs a reboot.

When rebooting it goes into a strange mode where it cycles through  
different colours (red, green, and blue) and grey patterns on the  
screen.

Just then on reboot it went ever more berserk, the fan came on full  
speed, the sleep light blinked rapidly and then it reboot itself again.

I've googled and freezing iBooks seems to be a common problem but I  
couldn't find a clear diagnosis or solution anywhere.

I've run the iBook full hardware test and it passed.  I've zapped the  
PRAM, taken the battery out for a while and still, it gets stuck,  
won't boot, or boots and freezes after login (as above).

I managed to get it into Target Disk Mode and copied all the  
important files off it.

I guess it could be the graphics subsystem?

Any ideas?

Cheers,
Ashley.


--
Ashley Aitken
Skype: MrHatken
04 1226-8159 (Mb)
08 9368-5505 (Ph)
ashley at hatken.com