Fix laptop fan not spinning

Hello guys. When the laptop computer boots up for about quarter-hour, it mechanically shuts down, the laptop computer fan doesn’t rotate (you may put your ear close to the cooling fan to pay attention). These are illnesses associated to the laptop computer fan (FAN).

Laptop computer fan not spinning because of 2 foremost causes:

– Trigger 1: As a result of the fan itself is broken, it might be as a result of burning of the copper coil on the stator core, or the fan’s FAN (rotor shaft) shaft is dry, inflicting it to lock up can not rotate.

– The second trigger: It is because of a defective temperature sensor circuit.

To repair the laptop computer fan not spinning, you’ll want to decide if the machine is having a fan error or the sensor ic is overheated.

1. Laptop computer fan

You take away the fan, use your hand to rotate the propeller to see if it rotates. Take note of rotate barely lest the FAN laptop computer break its wings.

If the fan spins arduous, then you definitely proceed to wash, spray RP7 to interrupt rust and oil after which attempt once more.
If the fan rotates usually, you may take a look at it with a VOM analog meter. Usually, there are 3 wires on the fan: 1 purple thread receives 5V energy, the black fiber is the mass pin, the yellow thread is used to regulate the pace (When the CPU, VGA chip isn’t scorching, the fan turns off or rotates barely, when CPU, VGA chip is scorching, the fan rotates strongly). You employ an analog meter to regulate to the X1 ohm scale, the purple rod plugs into the black wire (the fan’s mass wire) the black rod plugs into the purple wire (5V wire). If the fan rotates, it proves that the fan continues to be working effectively, the one motive left is the machine has a defective thermal sensor IC.

2. Thermal sensor IC

Determine the thermal sensor IC on the laptop computer: Often an 8-pin ic situated close to the CPU socket or fan jack. There’s additionally a thermal sensor ic situated on the opposite aspect of the CPU, situated close to the CPU or fan jack.

Pins 5, 6, 7, 8 are often linked to floor. Pins 1 and a pair of have 5V when opening the machine, you may change one other ic to test. Or if you do not have an ic as an alternative, then proceed to fishing by the next means.

On the wire linked to the fan jack, you proceed to chop the purple 5v wire and the yellow fan pace management wire, leaving solely the black mass wire. Then we use a wire to attach the purple wire of the fan to the 5V USB supply. Then the fan solely makes use of the bottom wire and the USB 5v purple wire, it can rotate constantly and won’t flip off or rotate slower (as a result of the sensor ic isn’t used anymore).

To seek out the 5V USB supply, you may activate the system, the black stick with mass, the purple stick close to the usb jack to search out the 5v supply. This fashion I’ve carried out quite a bit on laptops, so please be at liberty to attempt it. Want success.