12in AlBook fan is as loud as a MDD

[bryanus]

My 1GHz has loud, full-blast, max rpm, high-speed, constantly spinning fan. After reading of jholt5638's success by removing modem, I just finished trying it. I guess the mainboard is damaged, because removed modem and reset-all did not result in changed fan behaviour. But I did confirm:

OpenBSD/macppc Boot device considerations:

ide0 (cdrom) is valid as a root drive only if no hard drives are connected to the Ultra bus.

Is it a TiBook, too? Mine also has a bit of fan noise, but I don't think it's full-blast, but I could be wrong. I just got it and noticed the fan noise right away, from boot and under both a clean OS9 and 10.5.8 as well.

 

[TheWhiteFalcon]

I replaced the thermal pads with paste on LittleAl and fan behaviour is much improved, with nice progressive scaling.

 

[butterburger]

Is it a TiBook, too?

No, not a TiBook. I have September 2003 12-inch "1GHz Mini-DVI USB 2.0"; M9007LL/A; PowerBook6,2; EMC# 1986; A1010.

I will add: the temperature and speed (tachometer) sensors seem do work correctly (temperature rises with load, falls with idle, reported fan speed changes while I intentionally slow or stop fan spinning). Apple Hardware Test reports logic board okay, no problems found. No, thermal interface paste is not a problem. Fan in my specimen is simply driven at top speed. I do not know how fan control is achieved in this model, whether by PWM or potential (voltage) regulator or other; I guess, the governor / controller / regulator is kaput.