Sorry for my repeated threads about my poor Powerbook. I have a Powerbook G4 15" (1.67) and recently got the screen replaced, which is great. However I also reported the following and was told it was 'normal behaviour' when I called them to find out why nothing was done. - Sensor for graphics card in Powerbook G4 read 100 degrees C constantly, and now reads 'disconnected'. - Fan comes on immediately on startup, although not extremely loud, it is clearly audible in a quiet room. I was also advised that there 'is no temperature sensor' in the Powerbook's graphics card (9700 Mobility). I used Temperature Monitor to check the readouts. Can anyone confirm or disprove the above? Should I accept it and not call them back? I am concerned that although it does majorly impact my use of the machine, it would be nice to have it near silent some of the time, and it is rather worrying if it is a hardware issue!