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Most motherboards have a jumper switch usually situated close to the CMOS battery. The jumper usually connects over 2 pins with an open pin next to these. By moving the jumper over to the open & center pin you will reset all BIOS settings, including your BIOS password. Move the jumper back to its original position before turning your PC on. In some instances you will find no BIOS jumper. In such a case you can clear the password by removing the CMOS battery from the motherboard for a few seconds and then replacing it.
If you have forgot
BIOS password then you have to reset CMOS jumper setting. Please follow
the below steps: Open the Laptop back panel. Locate the CMOS battery,
remove it & then with the help of a screw driver keep on pressing
the terminal inside it and turn ON the computer for 10 secs and Turn Off
(make sure you keep on pressing the terminal with a screwdriver while
turning ON). It will short the BIOS setting. Now, fix the CMOS battery
& restart the computer. This will take care of the issue.
If you forgot your BIOS password,do not worry, you can reset your system back without requesting a BIOS password,Simply unscrew your laptop and get the motherboard of your laptop, locate the CMOS battery on the motherboard and remove for sometime for the battery to discharge say 4-10minutes,or better still if you can locate the jumpers for the BIOS and reset it,the BIOS password will be removed.It is the battery that keeps the BIOS chip alive by suppling it power,if power is not supplied to this chip,then the information on it will be lost.
So, remove the battery for some minutes or reset your BIOS jumper on the motherboard
WISH YOU THE BEST.
Dell Optiplex 780, user forgot BIOS master password (which is
necessary to change the boot order to run BartPE from CD and do an image
There is a jumper on the mainboard called PSWD1, which is set
(shorted). Remove power cable from PC (CMOS battery can stay in place),
open the lid. Remove jumper from PSWD1. Reconnect power, start the PC,
hit F2 to enter BIOS. All passwords should be reset.
Leave BIOS, power off the PC, remove power cable. Reattach jumper to PSWD1, close lid, reattach power cable. Start PC. Enjoy.