Disable Fast Startup And The Built-In Battery; Replace A Cru; Base Cover Assembly (For E490S) - Lenovo ThinkPad E490 User Manual

CRUs
Base cover assembly
M.2 solid-state drive
M.2 solid-state drive bracket
Speaker assembly
Memory modules
Wireless-LAN card
* for selected models

Disable Fast Startup and the built-in battery

Before replacing any CRU, ensure that you disable Fast Startup first and then disable the built-in battery.
To disable Fast Startup:
1. Go to Control Panel and view by Large icons or Small icons.
2. Click Power Options, and then click Choose what the power buttons do on the left pane.
3. Click Change settings that are currently unavailable at the top.
4. If prompted by User Account Control (UAC), click Yes.
5. Clear the Turn on fast startup check box, and then click Save changes.
To disable the built-in battery:
1. Restart your computer. When the logo screen is displayed, immediately press F1 to enter the BIOS
menu.
2. Select Config ➙ Power. The Power submenu is displayed.
3. Select Disable Built-in Battery and press Enter.
4. Select Yes in the Setup Confirmation window. The built-in battery is disabled and the computer turns off
automatically. Wait three to five minutes to let the computer cool.

Replace a CRU

Follow the replacement procedure to replace a CRU.

Base cover assembly (for E490s)

Prerequisite
Before you start, read Appendix A "Important safety information" on page 73 and print the following
instructions.
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.
40
E490/E490s/R490 User Guide
Self-service CRUs
●
●
●
●
●
●
Optional-service CRUs