Turn off the computer (use only as a last resort and with caution).Any changes made are reverted, and the BIOS or CMOS is set back to default settings. Access the Exit or Save & Exit tab in setup, select the Load Optimized Defaults option, select Yes, and press Enter.Press the F9 key to load default settings and press F10 to save and exit.If you have trouble exiting the BIOS or CMOS setup, you can try the following methods to fix the problem. Access the Exit or Save & Exit tab in setup and select the Exit or Save and Exit option.Press the F10 or F12 key to save changes and exit.Press the Esc key to exit without saving any changes.The most common methods include the following. There are several ways to exit the BIOS or CMOS setup depending on the computer's type. If this does not work, make sure your keyboard is working. Use something small like a pencil, pen, or paperclip and carefully push the retainer. On Creation Stations, the direction of the battery has the + (positive) side facing up. Take note of the orientation of the battery facing up (+ or -). Keep pressing the key until the computer stops booting, and you can enter setup. Find the CMOS battery, which is located on the right side of the motherboard. To do this, press and hold any key on the keyboard, and do not let go (you may get several beeps as you are doing this). Use a flat head screwdriver to gently pop the CMOS battery out of the battery holder, as shown in Figure 1. Additional suggestions for accessing BIOS or CMOSįinally, if none of the above suggestions allow access to the setup, try generating a stuck key error, which gives an option to enter the BIOS or CMOS setup. Locate the CMOS battery inside the node canister. Some early IBM computers require you to press and hold both mouse buttons as the computer boots to enter the BIOS setup. See the computer manufacturers list for contact information. Because these diskettes are unique to your computer manufacturer, you must obtain the diskettes from them. These diskettes may be called ICU, BBU, or SCU disks. BIOS or CMOS diskettesĮarly 486, 386, and 286 computers required a floppy disk to enter the BIOS setup. Older AMI BIOS could be restored to bootable settings by pressing and holding Insert as the computer is booting. While holding F10, two beeps should be heard to indicate the settings are restored. If your Acer computer cannot boot or you want to restore the BIOS to its original settings, press and hold the F10 as you turn on the computer. Below is a listing of key sequences to press as the computer boots to enter the BIOS setup. Unlike today's computers, older computers (before 1995) had numerous methods of entering the BIOS setup. If F10 doesn't work, look at the bottom or top of the screen for the key that's used to save the settings. If any changes are made, you need to save those changes, which is usually done by pressing the F10 key on the keyboard. For help with replacing the battery, see: How to replace the CMOS battery. By watching this video you can learn how to remove and replace the 3v CMOS battery on the Motherboard of your desktop or pc computer. If changes you made appear to revert to default settings, or the date and time setting in the BIOS keeps falling behind, you may need to replace the CMOS battery.
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