Bare cd drive jumper switch for mac1/28/2024 ![]() ![]() Find the CMOS battery on your motherboard. Press the power button multiple times to clear any capacitors.Ĥ. Disconnect your computer from the wall outlet.ģ. By removing and replacing the battery, you’ll erase the CMOS, forcing a reset.Ģ. This battery allows the volatile CMOS memory to stay powered even when the computer is disconnected from an outlet. If you have no other way to reset your CMOS, you can erase saved settings by removing the CMOS battery. Reset Your CMOS by Reseating the CMOS Battery Press the correct key to enter your BIOS options.Ĩ. Reconnect your computer to power and reboot.ħ. If you use your finger, make sure to ground yourself by tapping a bare metal surface (doorknobs are great) before touching anything inside your computer.Ħ. Press and hold the button for five to ten seconds with your finger or the eraser end of a pencil. You can find these on your motherboard manufacturer’s or computer manufacturer’s website.ĥ. If you’re not sure where to find it, look at your motherboard’s manual. Locate the correct button on your motherboard. Press the case’s power button multiple times to discharge any motherboard capacitors.Ĥ. It will typically be labelled something like “CLR,” “CLEAR” or “RESET.”ģ. This can be accessed by opening the computer case and locating the button within the case. Some higher-end motherboards have a board-mounted button to reset the CMOS. Resetting Your CMOS with a Motherboard Button Some motherboards have the option to load “optimized defaults,” which are a great starting point. Different computer makers use different keys, or you can set Windows 10 to boot into your BIOS for you.ħ. Depending on your motherboard, it can be the. Press the correct key to enter your BIOS options. Reconnect your computer to power and reboot.Ħ. You may need to use the end of a pen to hold down the button if it’s small.ĥ. Hold the “Clear” or “Reset” button down for five to ten seconds, then release it. Locate the case button labelled “Clear” or “Reset.” It’s typically next to or near the power button.Ĥ. You can unplug the power from the back of your power supply or from the wall outlet.ģ. Disconnect your computer from the wall outlet. ![]() This is the easiest method, but not applicable to all computers.Ģ. If you see a button on your computer’s case labelled “Clear” or “Reset,” that will reset your CMOS. Note: for the sake of brevity and recognition, we will use the term “BIOS” below to refer to UEFI and BIOS firmware. ![]() Pre-built systems might be a little more picky, but you can normally make one of the methods below work for you. If you’ve built your own computer, it should be easy to reset your CMOS. You might not have one now, but it’s a good procedure for the future. If you have an especially complicated setup, you can often back up your working UEFI settings and restore later. You will lose any custom BIOS configurations during a reset, but those can typically be easily reset. Occasionally, even a virus can corrupt your BIOS. If you’ve mangled your BIOS with a failed overclocking setup, changed the wrong BIOS settings, or your machine won’t boot properly, returning the BIOS or UEFI to the factory defaults can often set things right.
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