ThinkPad T480s, Hardware Maintenance Manual

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3. Remove the coin-cell battery. For instructions on how to remove the coin-cell battery, see “1110 Coin-
cell battery” on page 76. Wait for a few seconds.
4. Reinstall the coin-cell battery. For instructions on how to install the coin-cell battery, see “1110 Coin-cell
battery” on page 76.
5. Reinstall the built-in battery. For instructions on how to reinstall the built-in battery, see “1100 Built-in
battery” on page 74.
6. 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 Lenovo logo is displayed, 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 password or to recover data from the solid-state drive. To put the
system back to operational status, the only Lenovo and Lenovo-authorized service solution would be to
replace the solid-state 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 Lenovo logo is displayed, 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.
Power management
To reduce power consumption, the computer has two power management modes: sleep and hibernation.
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T480s Hardware Maintenance Manual