Before Servicing The Computer; Disabling The Built-In Batteries; Removing The Micro Sim Card; Removing A Major Fru - Lenovo ThinkPad T470s Hardware Maintenance Manual

Before servicing the computer

Carefully read this topic before servicing the computer.

Disabling the built-in batteries

Before replacing any FRU, ensure that you have disabled the built-in batteries.
For Windows 10, disable Fast Startup before disabling the built-in battery.
To disable Fast Startup for Windows 10, do the following:
1. From the desktop, type Power in the search box on the taskbar, and select Power Options.
2. Click Change 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.

Removing the micro SIM card

Some models you are servicing might have a micro SIM card that a customer has installed. If the computer
you are servicing has a micro SIM card installed, remove it before you start the servicing.
After you finish the servicing, ensure that you install the card back into the micro-SIM-card tray firmly.

Removing a major FRU

This section provides instructions on how to remove a major FRU.
64
T470s Hardware Maintenance Manual