powerbook G4: fan runs at max speed from startup

[gate2vn]

As stated on subject, the fan in my PBG4 runs at max speed from the laptop starts, and it's very loud. I have tried to reset NVRAM, PRAM, PMU, but no luck. The laptop is not hot at all.

Is there any idea about this case?
Thank you.

 

[indierthanthou]

I have this problem too, I guess it started when the person who owned it before me installed Tiger (I haven't installed Leopard yet). Maybe there is a glitch somewhere in the OS that makes them do this? I have searched online (as I am sure you have too) and tried all the solutions, including g4fancontrol and other apps (cant remember what they were) to no avail.

 

[gate2vn]

In fact, it's just going crazy recently, few days ago. The fan is quiet before. I am running Tiger 10.4.11

I am thinking something wrong with hardware, cause the fan always runs at max speed right after the laptop turns on. The good thing is it's very cool now. I am running over 2 hours with Photoshop, and it's not hot at all