MY CPU FAN IS CONSTANTLY RUNNING AT TOP SPEED and BIOS UPDATE PROBLEM

[cagdas]

Hi. I wanted to clean my CPU fan and disassembled my laptop. After cleaning, everything was fine as expected and my laptop worked fine for 10 minutes. I booted up Windows 10 (64bit). Then my CPU fan suddenly started to spin at high speed and it has never stopped again. When I press the power button it starts to spin at top speed immediately, even in bios. Except this issue my laptop works completely fine but as you guess it is very noisy and consumes the battery even faster. Besides, after trying several things I stuck on an ancient version of the bios and I couldn't update it.

What I tried for fixing that issue:

1. Tried every bios version from the latest one to the first one (01.01.00 to 01.09.01). Unfortunately, I stuck on the first version of bios firmware now.

2. Unchecked/checked the "CPU fan is always on" option.

2. I run an extensive hardware diagnostics test. All hardware got passed that diagnostics tests with "OK".

3. Always checking CPU temperatures it is always between 37-55 Celcius. It is ok.

4. I reapplied thermal paste on CPU and heatsink.

5. I removed the laptop battery and pressed the power button for15 seconds.

6. I removed the laptop battery and CMOS battery and waited for 30 minutes.

Now I have two major problems:

1. My cpu fan is running constantly at top speed and I couldn't manage to find a solution.

2. My bios version is very old now. When I try to update it skips the firmware update part and tries to update intel management device firmware and it comes to %50 then laptop reboots itself without any change.

Please help, waiting for your advice.. 😞