1, the first method is jumper discharge: the discharge jumper is generally three-pin, located near the CMOS battery socket of the motherboard, with battery discharge instructions. In the default state of the motherboard, the jumper cap will be connected to the pins marked with "1" and "2", which can be known from the discharge description as "normal", that is, the normal use state. When using this jumper to discharge, firstly use tweezers or other tools to pull the jumper cap out of the "1" and "2" pins, and then put it on the pins marked with "2" and "3" for connection. From the discharge instruction, we can know that the state is "clear CMOS", that is, Clear CMOS (as shown in the figure below). After a short contact, you can clear the user's manual settings in the BIOS and return to the default settings when the motherboard leaves the factory.
2. The second method is mainly used by everyone, but the success rate is not very high, that is, take out the power battery of the motherboard. For some motherboards, even if the power battery is taken out for a long time, the purpose of CMOS discharge can not be achieved; The battery disassembly method is as follows:
CMOS battery socket is divided into positive electrode and negative electrode, which can be discharged through short circuit. First, the CMOS power battery on the motherboard is taken out, and then the positive and negative electrodes on the battery socket are short-circuited with conductive objects (screwdriver, tweezers and other conductive objects) to achieve the purpose of CMOS discharge.