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Is the foreign exchange RTC formal?
Cause: The motherboard battery is dead. Solution: Buy a new battery and replace it to solve this problem.

1. Turn off the computer, as shown in the figure below for reference.

2. On the computer chassis, find the button cell on the computer motherboard, as shown in the figure below.

3. There is a battery base for fixing the battery tenon CMOS motherboard, as shown in the following figure.

4. Press the tenon outward with a screwdriver or directly by hand, as shown in the following figure.

5. At this time, CMOS batteries will become popular. You can complete a "discharge" with your right hand, and then put a new CMOS battery in its original position, as shown below.