![]() ![]() 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. Keep pressing the key until the computer stops booting, and you have the option to enter setup. 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). 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. 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 referred to as 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 the Insert key as the computer is booting. While holding the F10 key, 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. 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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