So my powerbook has decided to go to sleep randomly. It happens whenever the fans come on. Looked in the logs and it says "Power Management received emergency overtemp signal. Going to sleep." Looking at the temperature readings via Temperature Monitor, the trackpad is experiencing HUGE temp. spikes. I think my temperature sensor is bad. Unfortunately I don't have Applecare. My logic board has died twice already, once last december and once in may; my video died in June. Perhaps if I complained long enough they'd be sympathetic. Anyone have suggestions? This is the last Apple laptop I get without Applecare.