ibook g4 freezing after minutes

[issicus]

pretty sure its over heating. It can be used for about half an hour to an hour with g4fanconrol . with out g4fanconrol i would say about 10-20 minutes. any graphics intensive stuff seems to freeze it quicker.

I set g4fanconrol so the fan stays on.

when it freezes the screen locks up and the audio hick-ups .

I found some stuff about re-soldering or baking the logicboard (below). I dont think they are fixing the same problem. any ideas?

How to fix your broken G4 ibook motherboard | Macintosh How To

and

The ever popular iBook G4 Logic Board Issue... | Applefritter

 

[pershingd]

I just fixed the wife's iBook G4 the other day for the exact same problem. Your fan motor has died and is not running. I ordered a replacement fan from ifixit.com and followed their repair guide and had it fixed in less than an hour. Haven't had a problem since.

David

 

[issicus]

im pretty sure there is only one fan inside an ibook. mine is running I can hear it.

 

[Kevriano]

If the fans are working you'll hear them spin up on start up.
This is most likely a logic board issue (I've come across it before). The soldering fix is very good indeed. Worth doing for sure.
Download Temperature Monitor and run it for a while to see what temps you are running, and then report back.

Temperature Monitor 4.85 software download - Mac OS X - VersionTracker

 

[sunspot]

Similar Problem with iBook g4 1.07

About two weeks ago it froze and I had to boot into safe mode to log in. Eventually that stopped working and I zeroed out the hard drive and tried to install Leopard but it would freeze every time. Tiger would install but would freeze after 5-25 minutes exactly like it did in Leopard (total lockup, doesn't go to black, just freezes).
I installed Leopard onto a Powerbook G4 and copied the disk image to the iBook G4 hard drive and use G4FanControl to keep it running.
The fan works perfectly, in fact I put in a new one because the old one sounded broken.
It must be overheating, but, the tolerance has been greatly reduced. If I go over 40 degrees (sensor 1) it will freeze and I have to reboot. In the past it would get much hotter than that and the fans still wouldn't come on.
It seems like a serious hardware issue. I suspect the graphics chips but really don't know. Please help!