If the motherboard battery is out of power, the following phenomena will occur:

1. Every time the computer is turned on, the time will be restored to the initial time, which means that the time cannot be synchronized normally and the time is inaccurate;

2. Computer Bios settings do not take effect;

This situation will occur when the motherboard battery is dead. After entering the motherboard BIOS settings and restarting the computer, the previously set BIOS items will be invalid and will be restored to the original settings; for example, the computer has a power-on password set, but if the motherboard battery is dead , it will appear that the power-on password set is invalid, and you can still directly enter the computer next time;

3. Another situation is that after the computer BIOS is out of power, the computer cannot start up normally, and a black screen interface is displayed, prompting Press F1 to load default values ​​and continue. Of course, some computers can be booted without a motherboard battery, but often without a motherboard. When the battery is turned on and used, it is easy to damage the south bridge chip of the motherboard, causing damage to the motherboard.

Motherboard battery location:

Open the main case. Near the south bridge on the motherboard, there is a silver-white disc button battery with a plus sign on the back and a diameter of about two centimeters.

How to replace the motherboard battery when it is out of power?

The motherboard battery can be recharged when there is no power during use. Because the batteries on the motherboard of our computers are all lithium batteries, they can be charged when connected to the power supply. A motherboard's lithium battery can be used for many years. If the motherboard BIOS is frequently lost, we need to buy a new battery to replace it. If the power still drops frequently after replacing a new battery, then the reason is that the motherboard cannot charge the battery. The specific steps to replace the motherboard battery are as follows:

1. First buy a new motherboard BIOS battery. Make sure it is the same model as the battery on your computer. If your machine is a brand-name machine and is under warranty, you can contact customer service for replacement. Please do not open the case by yourself, otherwise the warranty will be cancelled. If it is a compatible machine (assembly machine), you can disassemble it by yourself to perform the above operations.

2. Turn off the power of the computer. Open the case cover and you will see a round battery. The diameter is about 1.5-2.0CM. Take out the battery. The battery holder of each motherboard is different, so the method of removing the battery is also different.

There are three common buckling methods for motherboard batteries:

● "External button type" To remove the battery, just press down the button next to the battery holder, and then push the battery out.

●"Buckle-type" battery holder. The button of this battery holder is made above the battery. To remove the battery, just pull the button outward and the battery will pop out automatically.

●The "press-on" battery holder makes it easy to remove the battery, just push the battery out.

3. At this time, take out the new battery and install it. Pay attention to the direction of the positive and negative poles of the mercury battery? Then reinstall the battery according to the reverse action of just removing the battery, and it is installed. Then close the case cover. If prompted to press F1 after booting, you can press F10 and hit Enter twice.

After replacing the motherboard battery, no special settings are required. You just need to modify the system time to the existing background time. Since most of the time settings are synchronized, this point can be ignored. If you still have lingering fears, you can restore the BIOS to factory settings and then boot up normally. To restore the BIOS to factory settings, you can refer to "How to restore BIOS to factory settings"