How to troubleshoot a laptop CPU fan thermal failure

1, the notebook computer CPU fan does not turn

Symptom: A notebook computer, found that the CPU fan in the computer running to the back panel temperature is very high when still do not turn, after the examination found that the computer started self-test will turn, indicating that the fan on the brake no problem. However, the back panel temperature is very high in the case still do not turn.

Processing method: CPU fan is mainly for the CPU cooling, only when the CPU temperature is above 70 ℃ will rotate for its cooling. In addition, the problem of high back panel temperature is not necessarily caused by the CPU, hard disk, memory, graphics and motherboards and other accessories of the heat may be gathered here, so the back panel temperature is too high and CPU fan is necessarily connected. In addition, it is recommended to run a large game at the same time test, if the CPU fan does not turn after a period of time, it may be the problem of the CPU fan.

2, the CPU fan installation is not in place to cause frequent crashes

Failure phenomenon: An IBM T42 notebook computer, as long as the start, run for a period of time will be slow, and there is no reason to panic and automatic restart of the phenomenon.

Processing method: Due to the CPU fan noise is large, the notebook computer before the CPU fan has been removed to do a clean, so judge may be the problem of CPU fan, resulting in excessive CPU temperature problems, the back of the test is T42 original CPU fan screws are not installed in place, The failure does not occur after reinstalling.

3, the CPU cooling duct jam caused by downtime failure

Failure phenomenon: After one hours on the operation of the sudden shutdown, after a while can be turned on, but open and shut down.

Processing method: Since it can turn on the hardware system is not a problem, the reason for this is probably due to high CPU temperature, automatically turned on the protection function and downtime. So we open the notebook computer inspection, if not found the problem of the CPU fan, and then open the cooling air duct, will find that some of the air duct is blocked, after cleaning the notebook computer recovery, you can solve the fault.

4, the CPU fan shutdown caused the panic failure

Symptom: The CPU fan of the notebook computer sometimes stops turning, cause the CPU temperature is too high and cause the panic.

Processing method: Now the mobile CPU basically has the temperature protection function, when the CPU temperature exceeds a certain limit, it will panic or reboot, thus protecting the CPU. If there is a problem with the CPU fan, should be sent as soon as possible to troubleshoot, to ensure the normal operation of the fan.

5, notebook computer CPU fan sometimes turn and stop

Symptom: A friend of Toshiba M2 laptop, after using a period of time found that the CPU fan sometimes turn, but feel the fuselage temperature has been very high.

Processing method: The laptop fan is designed by temperature control, the general CPU temperature is higher than 70 ℃ will rotate, the fuselage temperature is not representative of the internal temperature is really high, so this problem is not very big.