wrote:
Thanks for your reply. Apparently you are right about the overheating issue. Yesterday i removed the battery and things went much better. The screen went blank only once.
Today I took out the laptop's cover and pressed the power button just to make sure the new fan was working fine.
I noticed it worked for about 10 secs, then stopped. When the laptop got into the windows 7, the fan started to work again. Is this normal? I mean should the fan working continuously without interuptions?
During all of this, when i touch the heatsink interface, its really hot eventhough the laptop was working for about 5-7 mins. Btw i have never removed the heatsink as far as i can remember.
The heatpipe will be warm, but should not be "ouch" hot... Typically it is carring heat off the CPU / GPU to the fins of the heatsink where moving air from the fan takes it away from them. If the fan is not moving enough air, the heatsink will fail to work properly and your CPU will overheat.
If you replaced the fan with one that is not the same (model and CFM rating) you will have issues like you are seeing with overheating. A high CFM rate will usually mean more noise but not not higher RPM. It has more to do with the pitch of the fan blades more than RPM of the motor.
Anytime you replace a fan, it runs the chance of seperating the interface between CPU and hetsink... Always a good idea to remove the heatsink, clean surfaces with alcohol (as pure as you can get) and a non-lint cloth. Coffee filters work good for this (the paper ones) as they are lint free.
Good luck.
CB
