A BIOS jumper is used to configure settings in a computer’s BIOS and can be used to reset a lost password or corrupted update. It is found on the motherboard and can be difficult to manipulate. It can also be used for BIOS recovery mode and security features.
A basic input/output system (BIOS) jumper is a small device used to configure specific settings within a computer’s BIOS. The jumper is connected to a series of metal pins on a computer motherboard, which completes an electrical circuit and sets the appropriate setting. A BIOS jumper can be used in case of a lost BIOS password or a corrupted BIOS update.
The BIOS software is stored on your computer’s motherboard and runs when you turn on your computer for the first time. This software loads an operating system and controls certain hardware settings. The BIOS can be updated and most BIOS software can be password protected.
A BIOS jumper is found inside most computers. The jumper itself is made of a conductive material such as metal and is usually covered with a plastic overlay. During normal operation, the jumper remains in the factory position.
If a user has forgotten the BIOS password, a BIOS jumper can be used to reset it. The physical location of the jumper varies depending on the motherboard, but is usually near a flat, round battery. It’s best for users to refer to their motherboard manual for the location, because it often includes a helpful picture or diagram.
To reset the BIOS, the jumper must be removed from its normal position and placed in the reset or erase position. Some motherboards will label the location. Common tags include CLR for “clear”, PWRD for “password”, RESET, or a combination of these phrases. Again, your motherboard manual will often contain pictures or diagrams of the different jumper locations.
The small size of a BIOS jumper means it can be difficult to manipulate. Many users prefer to use a pair of pliers or tweezers to move the jumper. A computer should always be turned off and unplugged when working with internal components.
A BIOS jumper might also have a location for something called BIOS recovery mode. This is useful if an update has prevented your computer from starting. In some cases, this requires recovery software loaded onto a floppy disk, compact disc, or flash drive.
Some motherboards also implement security features to prevent malicious software from modifying the BIOS. These features require a BIOS jumper to be set to a different position before the BIOS can be updated. The jumper must be returned to its original position after applying the update.
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