What is the purpose of going into BIOS or CMOS?

What is the purpose of going into BIOS or CMOS?

The BIOS is the program that starts a computer up, and the CMOS is where the BIOS stores the date, time, and system configuration details it needs to start the computer. The BIOS is a small program that controls the computer from the time it powers on until the time the operating system takes over.

What happens if you turn on PC without CMOS?

The primary function of this is to keep the clock running even when the computer is turned off. Without the CMOS battery, you would need to reset the clock every time you turned on the computer. When you unplug the battery, your radio looses all of its presets and the clock resets.

Why do we need to set up BIOS in the computer?

The principal job of a computer’s BIOS is to govern the early stages of the startup process, ensuring that the operating system is correctly loaded into memory. BIOS is vital to the operation of most modern computers, and knowing some facts about it could help you troubleshoot issues with your machine.

Can a PC run without CMOS?

You can generally run your PC without the CMOS battery as long as your default CMOS parameters are compatible with the operating system, or as long as you manually set the appropriate CMOS parameters after every time the system loses power.

How to enter the BIOS or CMOS setup?

You need to press setup keys as your computer boots up. As a general rule, you should see a message like this: “Press to enter BIOS setup” upon the computer startup. Older PCs may not display the same. Instead, you may see a flashing block that instructs the right time to press the F1/F2 keys.

Why is my CMOS not working on my laptop?

One of the major causes of this problem is the CMOS battery. If the battery is several years old, it won’t be able to provide enough voltage to CMOS and this problem is bound to appear.

Where do I find the CMOS key on my computer?

The most common of the keys used to change the CMOS settings are Del, F2, F1, F10, F12 & Ctrl+Alt+Esc. If you have an assembled computer, then you can refer the motherboard manual to know the key to enter BIOS setup. For a branded system you can try the above mentioned common keys.

Why do I get a CMOS Checkum error?

BIOS settings are corrupt – The problem can also be caused by wrong BIOS settings which may be related to new devices you might have added. Either way, loading BIOS defaults should be enough to resolve the problem. One of the major causes of this problem is the CMOS battery.