Lenovo 7417P9U - Tp T400 C2d/2.4 14.1 2Gb 160Gb Dvdr Wls 6C Wvb Service Manual page 51

To replace the HDD, do the following:
1. Turn off the computer; then disconnect the AC adapter and all cables
from the computer.
2. Close the computer display, and turn the computer over.
3. Remove the battery.
4. Remove the screw that secures the slot cover.
5. Remove the slot cover.
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Chapter 5. Upgrading and replacing devices