The user must enter the supervisor password to get access to the BIOS and change the system configuration. Supervisor password: A supervisor password protects the system information stored in the BIOS.
#Remove bios password lenovo laptop manual
Then shut-down the machine and insert the battery (should be very careful in both removing and inserting the battery), then power on the machine this time if you decide to go to BIOS setup. Ive tried everything possible to reset the supervisor password on my Lenovo B570 laptop: looking for a non-existent CMOS. Hi, This is from p.24 of the service manual for a Lenovo Yoga 720-13IKB (15IKB) laptop. Open the computer and try to locate where the CMOS Battery is (it looks like a very big watch battery), remove battery and then switch or power-on the machine without the battery. Remove the battery for some minutes (lets say 5 minutes) to drain out the power in the machine then power-on the machine but connect it to a source of power, don't insert the battery.If it doesn't work try this one out, I am very optimist it will because I have tried it myself. Open you computer and try to locate where the BIOS Jumper is located, then remove it boot the machine without the jumper and the shut-it down, insert the jumper and boot again you will be able to access you BIOS setting without it requesting a password.
Besides, if you have other model of Dell laptops or other brands of laptops like Acer, HP, Lenovo, Asus. You must be conversant with hardware to do this.i have two option of which I have tried one. Battery removal can reset the BIOS, but not always. We don't have a guide on your specific model, but I came across this user manual that explains the procedure of replacing the battery. You can try this, I did it and it worked. To reset the BIOS password you need to remove the coin-cell battery and short out its contact points.
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