Before Servicing The Computer; Disabling The Built-In Battery - Lenovo X380 Yoga Hardware Maintenance Manual

Attention: The system board is sensitive to, and can be damaged by, electrostatic discharge (ESD). Before
touching it, establish personal grounding by touching a ground point with one hand or by using an
electrostatic discharge strap.

Before servicing the computer

Carefully read this topic before servicing the computer.

Disabling the built-in battery

Before replacing any FRU/CRU, ensure that you disable Fast Startup first and then disable the built-in
battery.
To disable Fast Startup, do the following:
1. From the desktop, type power option in the search box on the taskbar, and select Power Options.
2. 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, do the following:
1. Turn off your computer and disconnect the ac power adapter and all cables from the computer.
2. Turn on your computer. When the logo screen is displayed, immediately press F1 to enter ThinkPad
Setup.
3. Select Config ➙ Power. The Power submenu is displayed.
4. Select Disable built-in battery and press Enter.
5. 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.
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X380 Yoga Hardware Maintenance Manual