If you use computer a lot, it will be unavoidable to meet some motherboard faults. But you ought not to send the computer to a computer shop or motherboard shop for repairing in a hurry. In many cases, the problems may probably be in the CMOS.
If the mouse is not available when installing Windows or starting the Windows, this failure is generally caused due to CMOS settings error. Power management settings in the CMOS field has a modem use IRQ project, its options were 3, 4, 5..., NA. Generally the default option is 3, so set it to 3 items may solve this problem.
If your computer crashes or freezes frequently during the CMOS settings, the problem is usually in motherboard or CPU. Generally, this failure is due to board Cache or bad motherboard design heat. For cache problems, we can enter the CMOS settings and ban the Cache, but Cache ban will definitely affect the rate. If the cooling function is not good enough, it will result in the failure phenomenon in the motherboard. Crash failures can be resolved after replacing the high-power fans.
Board COM port, parallel port, or IDE port failure is usually due to user hot plug related hardware. At this time user can use the multipurpose card to replace. However, before replacement, you must prohibit the COM port and the parallel port on the motherboard.
If the failures cannot be resolved by the methods above, you can only replace the motherboard or CPU through some motherboard suppliers.