USB interface failure causes the computer to fail to start

Author: Han Xin

The flash memory interface broke down two days ago. As soon as the flash memory was plugged in, the "beep" interface kept calling. After the system is started today, "keyboard error or keyboard not exist" is displayed during self-check and cannot enter the system. After a keyboard is changed, the fault still persists. Is the keyboard interface burned out? As a result, I repeatedly plugged in the keyboard and found that when I inserted it in, the keyboard indicator will flash. This proves that the keyboard and keyboard interface are normal. It won't be because the motherboard has burned out, but my motherboard has been used for less than a year. It shouldn't be so easy to break down! For CMOS discharge, but the fault persists. Later someone suggested to try a keyboard with a USB interface. However, my USB interface is faulty. The small iron in it is distorted and the flash memory cannot be inserted. Alas, is there no other way? I reluctantly stabbed the driver into the USB interface, and the computer turned on automatically.
This triggered my inspiration: does the "keyboard error" refer to the USB interface keyboard? Due to the bending and short circuit of the iron in the USB interface, the computer may mistakenly think that there is a USB interface keyboard, but the USB interface keyboard does not exist at all, so the computer cannot be started.
In this way, I will start to repair it immediately. Unplug the power supply and use a tool to straighten the bent iron at the USB interface so that it will not be exposed to each other and lead to a short circuit. Plug in the power and start the system.