Lenovo ThinkPad E490 User Manual page 49

Note: Do not remove the base cover assembly when your computer is connected to ac power. Otherwise,
there might be a risk of short circuits.
Replacement procedure
1. Disable the built-in battery. See "Disable Fast Startup and the built-in battery" on page 40.
2. Turn off the computer and disconnect the computer from ac power and all connected cables.
3. Close the computer display and turn the computer over.
4. Loosen the screws that secure the base cover assembly.
5. Pivot the hook upward to disengage the hook from the chassis as shown
cover assembly 2
1 . Then, remove the base
.
Chapter 6 CRU replacement
43