Computers and Technology

How To Clear CMOS battery On Your Motherboard?

In the event that you’ve coincidentally found an issue that appears to be too hard to even consider breaking, you can definitely relax – odds are it’s nothing significant… nothing a past “clear CMOS” technique will not have the option to fix. Check online CMOS battery Price in India.

However, what is CMOS, is it protected to clear it, and would it be advisable for you to gather it straight up or search for other possible issues all things considered?

What is CMOS?

CMOS represents correlative metal-oxide-semiconductor however is frequently alluded to as CMOS RAM and RTC (continuous clock).

CMOS is a locally available, battery-fueled chip that is involved inside PCs for different things, including time, date, and framework settings.

Obviously, this relies upon the utilization case yet, in many situations, you won’t ever need to change your CMOS battery.

How might you let know if your CMOS battery’s levels are almost drained? It’s straightforward – your PC will not have the option to keep time and date records or other BIOS settings you have set after closures and your PC is probably going to show a few CMOS mistakes while booting up.

CMOS’ Aren’t the Same Anymore

Back in the past times of early IBM PCs, CMOS’ had the option to store 64 bytes of information altogether.

14 bytes were utilized for time and date stockpiling, and the excess 50 were utilized for framework settings capacity.

We’re discussing low-level settings here, used to control up the board and instate associated equipment and peripherals.

Nowadays, nonetheless, motherboard producers have moved the framework (AKA BIOS) settings from CMOS to either the Southbridge or Super I/O chips.

In any case, on the off chance that CMOS no longer stores framework settings – what does clearing CMOS do as well as resetting the time and date?

How to Clear CMOS/Reset BIOS?

Indeed, CMOS chips can’t store BIOS settings any longer.

All things being equal, board makers presently use NVRAM chips which besides the fact that a lot higher limit yet store have information perseveringly, in any event, when there’s no power source associated with the board.

Despite the fact that the CMOS chip no longer stores BIOS settings, current PCs actually have CMOS batteries, and the expression “clearing CMOS” is as yet utilized for resetting the BIOS.

Eliminating the CMOS Battery

Eliminating the CMOS battery is as yet the most widely recognized technique used to clear CMOS and reset BIOS settings to default values.

In any case, a few alternate ways are similarly as (maybe significantly more) clear as this one.

Utilizing the Reset Button

Nowadays, mid and top of the line sheets normally have reset CMOS/BIOS fastens either on the actual board or the back I/O.

To start it, turn your framework on and press the CMOS/BIOS reset button and you ought to be all set. Some Motherboards believe that you should set off the Button when the System is off. Counsel your Manual assuming that you’re uncertain which one it is.

Utilizing the Jumper

Most sheets don’t have actual buttons for clearing CMOS.

Be that as it may, exactly the same thing should be possible with the CMOS jumper. We’re alluding to a few pins situated close to the CMOS battery.

You’ll see either JBAT1 or CLEAR_CMOS composed close to it straightforwardly on the Motherboard.

The JBAT1, which ordinarily has just two pins, will clear CMOS in the event that you put a jumper on it to short the two pins. (Utilize some other jumper on the Motherboard) Short the pins briefly and supplant the jumper where you took it from. (on the off chance that you took it from different pins on the motherboard)

The default is the (normally) currently present jumper on pins 1-2. Set the jumper to pins 2-3 to clear CMOS and following a moment, move it back to 1-2.

Resetting from the BIOS Menu

Individuals will quite often clear CMOS when they couldn’t get into BIOS/UEFI.

On the off chance that you can get to your BIOS, however, you actually need to reset the settings, just select the “Reset BIOS to (Factory) Default” choice and that is all there is to it.

How could You Need to Clear CMOS?

Here are the three primary justifications for why you could have to clear CMOS:

Investigate Hardware Compatibility Issues

Clearing CMOS won’t give your framework or motherboard execution benefits.

Notwithstanding, it can help you during the time spent investigating by resetting the framework settings. This will assist you with making quick work of the issue a lot simpler, particularly in the wake of putting in new equipment into your machine.


This is the way you can clear CMOS:

Eliminating the CMOS battery is as yet the most widely recognized approach to clearing CMOS/resetting BIOS

CMOS chips don’t store BIOS information any longer. These are regularly put away in Southbridge or Super I/O chips

Clearing CMOS should be possible in more than one way, including eliminating the battery, utilizing the jumper, or squeezing the reasonable CMOS button

Clearing CMOS can assist you with investigating, resetting framework wide passwords, and resetting BIOS defaults after ineffective overclocking or equipment redesigns.

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