Lenovo ThinkPad T420si User Manual page 116

• Do not drop the drive or subject it to physical shocks. Put the drive on a material, such as soft cloth, that
absorbs any physical shocks.
• Do not apply pressure to the cover of the drive.
• Do not touch the connector.
The drive is very sensitive. Incorrect handling can cause damage and permanent loss of data.
Before removing the hard disk drive, make a backup copy of all the information on it, and then turn the
computer off.
Never remove the drive while the system is operating, in sleep (standby) mode, or in hibernation mode.
Replacement instructions
To replace the hard disk drive, do as follows:
1. Turn off the computer; then disconnect the ac power adapter and all cables from the computer.
2. Close the computer display, and turn the computer over.
3. Remove the battery. Refer to "Replacing the battery" on page 97.
4. Remove the screw that secures the hard disk drive (1), then remove the cover (2).
5. Remove the hard disk drive by pulling out the tab.
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User Guide