Lenovo ThinkPad X390, Hardware Maintenance Manual, Page: 40 / 108

How to remove the power-on password
To remove a power-on password, do the following:
If no supervisor password has been set, do the following to remove the power-on password:
1. Turn off the computer.
2. Remove the battery. For instructions on how to remove the battery, see “1040 Battery” on page 66.
3. Remove the coin-cell battery. For instructions on how to remove the coin-cell battery, see “1080 Coin-
cell battery” on page 71. Wait for a few seconds.
4. Reinstall the coin-cell battery.
5. Reinstall the battery. Turn on the computer and wait until the POST ends. After the POST ends, the
password prompt does not appear. The power-on password has been removed.
If a supervisor password has been set and is known to the service technician, do the following to remove the
power-on password:
1. Turn on the computer.
2. When the logo screen comes up, immediately press F1.
3. Type the supervisor password to enter the ThinkPad Setup program.
4. Select Security .
5. Select Password .
6. Select Power-On Password .
7. Type the current supervisor password in the Enter Current Password field. Then leave the Enter New
Password field blank, and press Enter twice.
8. In the Changes have been saved window, press Enter.
9. Press F10 to save changes and exit the ThinkPad Setup program.
How to remove the hard disk password
Attention: If User only mode is selected and the user hard disk password has been forgotten and cannot be
made available to the service technician, neither Lenovo nor Lenovo-authorized service technicians provide
any services to reset the user hard disk passwords or to recover data from the hard disk drive. To put the
system back to operational status, the only Lenovo and Lenovo-authorized service solution would be to
replace the storage drive with a scheduled fee.
To remove a user hard disk password that has been forgotten, when the supervisor password and master
hard disk password are known, do the following:
1. Turn on the computer.
2. When the logo screen comes up, immediately press F1 to enter the ThinkPad Setup program.
3. Select Security .
4. Select Password .
5. Select Hard-disk x password , where x is the letter of the hard disk drive. A pop-up window opens.
6. Select Master hard disk password .
7. Type the current master hard disk password in the Enter Current Password field. Then leave the Enter
New Password field blank, and press Enter twice.
8. Press F10.
9. Press F10 to save changes and exit the ThinkPad Setup program. The user hard disk password and the
master hard disk password have been removed.
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X390 Yoga Hardware Maintenance Manual