A relative of mine brought this laptop for repair. He explained the loud cooling fan noise when he powers on the laptop. It was so annoying and he was worried that the fan was not doing its job to cool off the laptop.

Usually a noisy laptop cooling fan is caused by dirt and moisture mixed inside the device.

When these two elements are combined, the fan is not spinning freely to cool down the laptop. It was time to dismantle the device and get it fixed.

As I get to the main board of the laptop, I immediately spotted the dirt inside the machine. When I rotated the fan with my hand, it was not rotating freely so I had to take it apart and clean it, lubricate it and while at it, check the thermal paste at the main CPU of the laptop.

I got out my soft brush that I bought from a store that sells makeup for women. It is so soft yet very inefficient in brushing out all the nasty stuff in there.

For areas that I cannot reach with my soft brush, I used an air blower to get rid of the dirt in there.

I had to clean also the vent that is connected to the fan as well because it was really bad.

After I cleaned the fan, sprayed it with lubrication contact spray, the fan was once again rotating freely without any noise. The main test for the fan is when the laptop is on so I will have to test it later after I have replaced the thermal paste on the main CPU chip.

As expected, the thermal paste was dry and needed a new fresh paste there. Of course I cleaned it up with a Q tip dipped in cleaning alcohol and then added the new fresh thermal paste.

I also cleaned the heat sink that sits on the top of the CPU and then I put everything back together and hoped for the best.

I turned it on the fan was running smoothly then the whole laptop started to vibrate which made me wonder what was going on. Later on I recalled that I did not put the screw back that holds the main board to the housed of the laptop.

I had to open it once again and put the screw back the way it was before and tried the laptop again. This time, everything was running smoothly, no fan noise and no vibrations.

Mission Accomplished. 

This article was prepared for you by Waleed Rishmawi, one of our ‘Master Authors’ and currently working in the Bethlehem area of Palestine repairing electrical and electronic equipment.

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Note: You can check his previous repair articles in the link below:

https://www.electronicsrepairfaq.com/a-dead-blu-tooth-speaker-was-brought-back-to-life