How to clear an unknown BIOS or CMOS password

Updated: 08/02/2020 by Calculator Hope

Sometimes, users run into a password prompt at kick or the BIOS or CMOS setup is locked, equally shown in the image below. If yous do not know the BIOS countersign, yous need to clear it. The following sections contain instructions on how to practice and so using multiple methods.

CMOS setup locked password screen

Clear using jumper (recommended)

Follow these steps to clear the BIOS or CMOS password using a hardware jumper.

Caution

When working inside a computer, be sure yous're aware of the potential damage that can be caused by ESD.

Computer jumper

On the computer motherboard, locate the BIOS clear or password jumper or DIP switch and change its position. This jumper is often labeled Articulate, CLEAR CMOS, JCMOS1, CLR, CLRPWD, PASSWD, PASSWORD, PSWD or PWD. To clear, remove the jumper from the 2 pins currently covered, and place it over the two remaining jumpers. An example of the diverse jumper positions is shown in the image. Some computers may also clear the password past keeping the jumper open (one or no pins covered).

What if I can't locate the CMOS password jumper?

The following list details the general locations for the CMOS jumper. It's important to realize that near motherboards have multiple different jumpers, so you need to brand certain yous're irresolute the correct jumper. If you cannot find the countersign jumper, consult your motherboard's documentation by looking in the manual or downloading it from the manufacturer's website.

  1. On the edge of the motherboard - Nearly jumpers are on the side of the motherboard for easy accessibility. Verify past looking at all visible edges of the motherboard.
  2. By the CMOS battery - Some articles place the jumper to articulate the CMOS or BIOS password past the CMOS battery itself.
  3. Past the processor - Some manufactures place the jumpers by the CPU of the computer.
  4. Under the keyboard or bottom of laptop - On a laptop, the DIP switch are nether the keyboard or on the bottom of the laptop. It is usually located in a compartment such as the i containing memory. (Laptops ordinarily use DIP switches, non jumpers.)

Once the advisable jumper or DIP switch is located and toggled, the countersign should exist cleared. Turn your machine on to verify that the password has bee reset. One time cleared, turn the estimator off and render the jumper or DIP switch to its original position.

Remove CMOS battery

CMOS battery

Removing the CMOS battery, like the 1 shown in the picture, causes the system to lose all CMOS settings, including the BIOS password. Locate and remove the CMOS battery from the motherboard for at to the lowest degree five minutes, then replace the bombardment and plow the computer dorsum on.

Generic passwords

Try using generic CMOS passwords. Information technology should exist noted that many of these default passwords are for older motherboards and no longer work with newer machines.

  • Generic BIOS password listings.

Leap the CMOS solder beads

Older computers, especially older laptops, don't accept jumpers or DIP switches. They crave the user to jump a pair of solder beads on a circuit lath. The identification and location of these solder beads can vary and if non available in the computer documentation, is simply obtainable through the computer manufacturer.

If you've identified the solder chaplet, they can be jumped by placing a flat-caput screwdriver over the 2 beads and leaving it on those beads while turning on the computer. Once the reckoner has booted, plow it off and then remove the screwdriver.

Contact manufacturer

If none of the previous sections resolved your issue, we recommend you lot contact the computer manufacturer or motherboard manufacturer for the steps on clearing the computer password.