System Startup exception caused by CPU fan

Recently, my friend rushed to me and said his computer could not start properly. After the device is turned on, the monitor cannot light up, and the PC horn keeps making alarms.

I first thought it may be because the accessories are loose for a long time, so I disconnected all the power, unplugged the video card, CPU and memory, and re-inserted it carefully. After the device is restarted, the monitor still cannot light up. I also carefully checked the hard disk data cable and soft and hard disk I/O, and did not find any signs of looseness. Is there Poor contact on the line? The test pen is used to test each interface. However, no short circuits or poor contact were found.

I quickly asked my friends about recent computer usage. A friend said that he just replaced the CPU with a high-power heat dissipation fan a few days ago, and that was the case after the new fan. However, the fan was tried in the Computer City and there was no problem when it was used on someone else's computer.

The next day, I removed my CPU fan "chief frozen officer" and came to my friend's house again. I tried to remove my friend's CPU fan and replace it with my own one. After the boot, everything will return to normal! It seems that the "culprit" of the entire incident is a friend's new CPU fan!

As my friend is using the MSI 6163bx motherboard, I suddenly thought that this series of motherboard has a fan speed function. I guess, isn't my friend's new fan not supporting this speed? So I entered the BIOS settings of the motherboard and saw that the fan speed measure function was turned on! Quickly shut down the fan speed measure, shut down and change it into a friend's heat dissipation fan. As I did not expect, this time everything is normal! In this way, everything is "dark"-for the motherboard without the fan speed function, use a friend's new fan will not have a problem; for the motherboard With this function, disabling the speed control function of the CPU fan can also prevent faults!

So I would like to remind all of you that when you encounter such problems and cannot use other methods, you may wish to start with hardware collocation, check whether the newly purchased accessories do not support certain special functions-in this example, the CPU fan does not support the speed measurement function of the motherboard. In this way, the seemingly difficult problem may be solved!