What Are Signs of CMOS Battery Failure in PC? Watch Pro Guide

Computer CMOS battery failure: symptoms, repair methods and related information

This article will introduce the symptoms of CMOS battery failure and how to fix it.

What is a CMOS battery?

The CMOS battery provides continuous power supply to the CMOS chip on the computer motherboard. The CMOS chip stores important system configurations and settings, such as system time and date, hardware settings, and some of the main parameters required for startup. After shutdown, these settings are still saved by the CMOS battery. Laptops and desktops of Dell, HP, Lenovo and other brands are equipped with CMOS batteries.

However, sometimes CMOS batteries can fail or fail, causing some errors and problems. Next, we will discuss some symptoms of CMOS battery failure.

Related articles: How long does CMOS battery last and how to extend its life

Symptoms of CMOS battery failure

1. The computer cannot start: The BIOS needs continuous power supply to start the computer normally. When the CMOS battery fails, it fails to provide power, resulting in startup problems. But some users hold different opinions about this symptom, you can do this in our previous article - What is a CMOS battery? Can the computer run without it? Find relevant information in .

2. Checksum Error: Checksum error is one of the most common signs of CMOS battery failure. Usually, this kind of error occurs when there is a conflict between the BIOS and CMOS. In this case, your computer cannot read the startup information or the information does not match the BIOS.

3. Date and Time Automatic Reset: Continuous Resetting of Date and Time is another typical CMOS battery failure symptom. No matter how many times you set the correct date and time, what you always see is the default value. If you notice this, your CMOS battery may have failed.

4. Driver is unresponsive and various hardware failures: The driver is responsible for running the hardware device correctly. If the CMOS battery responsible for tracking the device driver fails, the driver may stop responding or disappear from the computer. The machine then fails to recognize the hardware, causing various problems and failures.

5. Continuous beeping: Your motherboard may make continuous beeping. If you hear 10 short beeps, it means your CMOS battery is malfunctioning.

Other signs of failure of CMOS battery:

• Unable to connect to the Internet
• The computer keeps shutting down without any user input
• The printer does not work, and the printer cannot be found
• Peripheral devices are not responding

Through the above symptoms, you can determine whether the CMOS battery has failed. Your CMOS battery may be close to the end of its service life and you should replace it as soon as possible.

How to fix CMOS battery failure in your computer?

The only way to fix a CMOS battery failure is to replace the battery. The failure will not cause any data loss, nor will the saved files be affected. After replacing the CMOS battery, you can still store pictures, videos, documents, etc.

Here is how to replace the failed CMOS battery:

Step 1: Turn off the computer and disconnect the power and peripherals.

Step 2: Open the CPU cover.

Step 3: Find the CMOS battery, remove it, and install the new battery.

Step 4: Cover the computer, start the machine, and check if your computer is working properly.

Conclusion

There are many signs of CMOS battery failure, and you can find some common signs in this article. If you experience one of these typical symptoms, try replacing the battery. Hope this article helps you.

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