How to Fix CMOS Battery Error in [2022]

Clearing a specific CMOS will reset BIOS settings support to factory defaults. In most cases, you can clear this CMOS in the BIOS settings. In some cases, you may need to open the computer case.

Restart your computer. A normal reboot usually triggers a new checksum and fixes these errors.
Download and flash the BIOS update. Download the update from the websites of most motherboard manufacturers.
Reset BIOS.
Replace CMOS battery.
Consult with almost any computer repair technician or expert.


If the problem reoccurs the next time you turn off your computer, your current CMOS battery may be bad or already bad. Leave the computer for a few days before replacing the CMOS battery. Sometimes a new computer may stay on. Charge the battery normally. uses a dedicated security service to protect against online attacks. This process is automatic. You will be redirected after verification is complete. is understood to use a security service to protect against online attacks. The service requires full cookie support in order to display this website.

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How do you reset the CMOS on a computer?

Turn off your computer.
Unplug your computer from the wall outlet.
Press the power button several times to clear all capacitors.
Locate the CMOS battery on the motherboard.
Gently clean the CMOS battery.
Wait a few minutes, then replace the CMOS battery.

Are you prompted to reset the time and date every time you turn on the laptop? In this situation, the operating system refuses to boot? You can’t connect to the Internet and your computer keeps giving a boot error, the hard disk driver could not be found?

Sound familiar?

I’ve been in the tech industry for a very long time and I’ve been approached from time to time with this particular question or concerns about it. I also dealt with this problem on my PC.

So don’t waste your time. Skip to the exact beginning, read to the end to understand and solve your problem. It can help quench your incredible thirst for knowledge. Who knows!

Why does the CMOS battery fail?

CMOS batteries fail for many reasons, one of the most obvious beingx is that they could last your BIOS for a long time, 2-10 years. It is still connected to the circuit, the actuator moves through the circuit, and any chemical reaction takes place. This reaction will limit the elapsed time and eventually your large CMOS array will fail.

Well, that’s fine. Since this is a battery, it may die over time. In addition, there may be external problems on our own motherboard.

Follow our troubleshooting guide Booting a motherboard without a CMOS battery.

What Is A CMOS Battery?

How do I fix the CMOS error on my computer?

Restart this particular computer. A normal reboot usually gives a new checksum and fixes most of the error.
Download and flash the BIOS update. Download the update from the manufacturer’s websitemother board.
Reset BIOS.
Replace CMOS battery.
Contact a technician or computer repair technician.

CMOS stands for Complementary Metal-Oxide Semiconductor. But before moving on to battery CMOS, our team needs to first discuss the BIOS.

Which BIOS?

BIOS can be a computer program stored in EPROM and used by the CPU to facilitate startup operations when the computer is turned on. It is a set of “Basic systemsinput-output topics.

Normally, the BIOS stops first when you turn on your computer. It is the link between the operating system and the hardware. It differs from a new system operation in that it tells the computer how to start the system operation.

Let’s say you’re running a software update. First, the CPU, which sends precise instructions to your hard drive to find the software in memory. Once it finds the relevant program data, it sends the data to your CPU again.

When the CPU tilts the program, it eventually sends signals to your GPU, indicating what image it needs and what image it wants to create. Your GPU monitor then fires up and you tell it how to position the pixels over most of the screen.

What is CMOS failure?

The most common symptom of a bad CMOS battery is an incorrect or slow system date and time in a particular BIOS, loss of BIOS settings every time youturning on the computer, “stop the clock” and “stop the time”. Typically, when the CMOS battery is low, the BIOS modalities are lost when the computer or laptop is turned off.

This is one of those parts of your motherboard that usersspruce can be modified to fine-tune the settings your computer needs. It all starts with the reincarnation of the BIOS every time you turn on the PC.

But how can the BIOS keep the index intact? Where are these changes located to ensure they are saved?

The BIOS should continue to work after the computer is turned off. However, if you turn off your own computer, the BIOS settings will definitely change. This is where CMOS usually comes in handy. Motherboard manufacturers use long life CMOS whose battery can prevent system memory settings from changing due to performance loss.

See See our separate article on how to weak HDMI signal on motherboard.

The CMOS battery provides enough power to regularly keep BIOS contents intact in RAM when the device is turned off.

I have a CMOS bank on one of my PCs that has been running for about nine years now. Typically, a CMOS battery can last between 2 and 10 years.

Can the computer run without a CMOS battery?

Yes. The computer can operate without a CMOS battery.

If ba The CMOS card will be removed or disabled, it will stop supplying power to support the motherboard. As a result, CMOS is reset and all developer settings are lost. This comes after having to reset the clock every time someone turns on your computer.

Signs Of A Failing CMOS Battery

The CMOS battery is a real small round battery that can store data even after the computer is turned off. Even though it is battery powered, it will die out over time; you should be able to tell when it’s something like death or already death.

Because a failed CMOS battery usually causes many problems, you should be quick to recognize signs of depletion. Check out some of the signs of a failed CMOS battery.

1. You will lose real time clock configuration

When the CMOS battery is low or about to run out, out cannot tell the difference between turning the PC off and on. Thus, he loses his new power; he loses the ability.

So every time you turn on your computer, you realize that your computer’s time and resources are incorrect. Your motherboard’s CMOS battery may be low or dead.

Be sure to check out best 4800MHz RAM for faster gaming experience.

2. I get a checksum error on startup

When booting a desktop computer, a CMOS scan error or checksum error may occur due to a battery failure.

Normally, when the battery is low or nearly empty, CMOS values ​​such as hardware settings, date and time may be corrupted. So the notepad has no values ​​to check for more time. This will result in device boot errors.

Note. Worst case yourthe only computer won’t boot at all.

You can ask questions like:

Can a dead CMOS battery prevent my computer from booting up?

How do you reset the CMOS on a computer?

Turn off all your computers.
Unplug the computer from the outlet on the structure.
Press the power button several times to clear all capacitors.
Find the CMOS battery life on the motherboard.
Carefully remove each CMOS battery.
Wait a few minutes, then replace the CMOS battery.

An inefficient CMOS battery may or may not prevent your computer from booting – it depends on the motherboard. Some may supply motherboards with a dead battery, while others require a CMOS shoe battery. Tracks battery data and saves time and date when running shoes.

3. Your computer will shut down

If you encounter ragged faces, your computer shuts down without giving you a single beep or anything, and probably refuses to boot up when you try to turn it back on.

Hardware drivers stop working when your laptop boots because the battery is always low. If you don’t like your battery, cmos will sometimes show you an unwanted disconnect.

What is CMOS failure?

The most common symptom of a CMOS battery failure is an incorrect or slow date and time in the BIOS, loss of BIOS settings when the computer is turned off, an error message “alarm stopped”, etc. If the CMOS battery is charged, then the BIOS settings will certainly fly off, if you just turn off your computer.

What does CMOS reset fix?

Clearing most of the CMOS will reset the BIOS to factory settings. In most cases, you can view CMOS in the BIOS menu. In some cases, you may need to open your computer settings.

When starting a computer you see a message a CMOS error What is the most likely solution?

Bad or possibly old CMOS battery
Reboot the user’s computer. If the error persists after restarting the computer, enter the generated CMOS and check all values. Also check if the date and time are valid. After everything is checked and enabled, be sure to save the settings and then exit the CMOS setup.