Power Management - IBM ThinkPad X20 Hardware Maintenance Manual

How to remove the hard-disk password:
Attention:
If User only mode is selected and the user HDP is
forgotten and cannot be made available to the servicer,
IBM does not provide any services to reset the user HDPs
nor recover data from the hard-disk drive. The hard-disk
drive can be replaced for a scheduled fee.
To remove the user HDP that has been forgotten, when
the SVP and master HDP is known,do the following:
1. Power on the computer by pressing and holding F1.
2. Enter the SVP. The IBM BIOS Setup Utility menu
appears.
3. Select Password, using the cursor keys to move down
the menu.
4. Select Hard-disk x password, where x is the letter of
the hard-disk drive. A pop-up window opens.
5. Select either User HDP or Master HDP.
6. Enter the master HDP; then leave the New Password
field blank and press Enter twice.
7. Press F10
8. Select Yes in the Setup Configuration window. Both
user HDP and master HDP will have been removed.

Power management

To reduce power consumption, the computer has three
power management modes: screen blank, standby, and
hibernation.
Screen blank mode: In screen blank mode, the following
occurs:
v The LCD backlight turns off.
v The hard disk drive motor stops.
v The speaker is muted.
Note: Screen blank mode in Windows 98 is called standby
mode in Windows 95.
To enter screen blank mode, press Fn + F3. To end screen
blank mode and resume normal operation, press any key.
Standby mode: When the computer enters standby mode,
the following events occur in addition to what occurs in
screen blank mode:
v The LCD is powered off.
v The hard disk drive is powered off.
v The CPU stops.
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ThinkPad X20, X21, X22