i have macbook core duo 1.83 Ghz. the heating problem has greatly affected my laptop usage. i have even sent it to apple workshops and every time they say that problem is fixed but in a couple of days it occurs again. they always take huge fee for their so called "fix".they say that they clean something on thermostat or something and fan starts working again.i have given it to two different apple workshops but they always clean it and avoid to change the fan even when i ask them, they just say that its not required.it gets extremely hot, hangs and even shutdowns on running heavy applications like parallels, ms office and yes specially while using youtube! i tried smcfancontrol and it shows fan speed around 2700rpm temp 85c with youtube on.i tried to increase fan speed with it but it dosent change.And ya, the warranty period is over ;-(
please help.