Keyboard Mouse
Motherboard Repairs – Keyboard and Mouse not be Detected
When your motherboard does not recognize your keyboard or mouse, it may have three cases:
One, keyboard, mouse, 9 pin serial port, 25 pin serial port and game port are generally commanded by peripherals’ controller chips such as IT8702F-A (ITE) or 83977EF- AW (Winbond). And those parts on some motherboards are directly controlled by the Northbridge chips. If these motherboards do not recognize their keyboard and mouse, first of all, you should examine whether the 5V power supplying keyboard and mouse is working normally. If it does not work properly, you need to check whether the safety resistor of the power supply is fused. In case the fuse resistor is in high resistance, you can directly connect a thin wire to the line. (For cost saving, some motherboard makers also use a thin wire to directly communicate the line without a fuse resistor). If the supply of power is working normally, ruling out peripheral problems the trouble is commonly due to the two aforementioned chips that are damaged after hot plugging the keyboard or the mouse, and for this you need to change a new controller chip.
Second is the loose of the keyboard port or the mouse port. Sometimes your keyboard or mouse can work again by gently shaking them. It is because frequently plugging your keyboard or mouse would easily make their ports loose and leads to poor contact between the ports and the keyboard or the mouse, and then you need to replace the ports.
Third, keyboard or mouse is not compatible with your motherboard, which manifests as keyboard or mouse can not be found on boot, prompts to press F1 to continue on start, or mouse moves randomly on the desktop. If so, you need to replace the keyboard or mouse.
Why not click here to see what driver problems or outdated drivers your computer has, and how to fix them quickly and automatically with Driver Checker?
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