![]() When your computer gets unplugged, BIOS relies on the CMOS battery for power. īIOS needs to remain operational even when your computer isn’t plugged into a power source. We’ll teach you how to use BIOS to overclock at the end of this article.ĬMOS stands for “Complementary Metal Oxide Semiconductor.” The CMOS battery powers the BIOS firmware in your laptop. You can program your computer for overclocking by adjusting the BIOS settings. If you’re a PC gamer, you might be interested in learning how to overclock your computer to boost your processing speed while you’re gaming. ![]() Booting up your operating system is the basic output. It performs basic functions for your computer while your computer is still waking up. You press the power key to turn on your laptop, right? Well, how’s your laptop supposed to process the power key when the laptop is turned off? That’s what the BIOS is there for. BIOS instructs your computer on how to boot up the operating system, and it also operates the peripherals (like the mouse and keyboard). The BIOS is tasked with managing your computer’s exchange of inputs and outputs, mostly when you’re booting up your computer. Then your graphics processor sends instructions to your monitor telling it how to arrange the pixels on the screen to create the image an output.Įverything your computer does can be boiled down to an input or output.It sends instructions to your graphics processor telling it what image needs to be created an input. Your hard disk retrieves the software program data and sends it back to your CPU that’s an output.Your CPU sends an instruction to your hard disk to retrieve the software program from storage that’s an input.Let’s say, for example, that you’re opening up a software program: BIOS is something that’s integrated into the computer while it’s being manufactured.īIOS stands for “Basic Input/Output System.” What exactly does it do? Basically, it manages the essential functions of your computer.Īll computers function through a process of inputs and outputs. Operating systems can be installed, uninstalled, and updated long after you’ve bought the computer. To understand the importance of a CMOS battery, you first need to understand what your computer BIOS is.Įvery computer has BIOS pre-programmed into its hardware. While the main laptop battery powers all of the components from the CPU to the hard drive and tends to be one of the largest and heaviest parts of your laptop, a CMOS battery powers just the BIOS, and is usually coin-sized and lives on the motherboard. Wait, my laptop has more than one battery? In short, yes. How do I replace the dead CMOS battery with a new one?.How do I diagnose a CMOS battery failure?.You can also search for your laptop in the MyFixGuide store to find the CMOS Battery.Thankfully, it’s easy to install a new CMOS battery in your laptop. To check the CMOS Battery model, you can remove the bottom cover to check it or ask the laptop manufacturer. The CMOS Battery of each laptop is different. ![]() Remove it and replace it with a new CMOS battery.Usually, the CMOS Battery is fixed with a double-sided tape on the palmrest, which can be separated from it by applying a little force.Otherwise, static electricity may damage your notebook. Please note that you must disconnect the built-in battery cable before you can touch other components. Disconnect the Built-in battery cable from the motherboard, then disconnect the CMOS battery cable from the motherboard.Remove the bottom cover from your laptop and check the CMOS Battery on the motherboard.Remove the old battery and install a new one.ĭesktops Always use the battery with the following model number: CR2032 3V Lithium Battery (manufacturer can be different, but the model number would be the same).On pushing it down, the battery will automatically pop up.Press down the Tenon with a screwdriver (or with your nail, if not available). ![]()
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