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Before Servicing The Computer; Disable The Built-In Battery; Removing The Nano-Sim Card; Removing A Major Fru - Lenovo ThinkPad P15 Gen 1 Hardware Maintenance Manual

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• 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.

Disable the built-in battery

Before replacing any FRU/CRU, ensure that you disable the built-in battery.
To disable Fast Startup, do the following:
1. Go to Control Panel, and then change the view of Control Panel from Category to 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, do the following:
1. Restart your computer. When the logo screen is displayed, immediately press F1 to enter ThinkPad
Setup.
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.

Removing the nano-SIM card

If the computer has a nano-SIM card installed, you need to remove the nano-SIM card before you start the
servicing.
After you finish the servicing, ensure that you install the nano-SIM card back into the slot firmly.

Removing a major FRU

This section provides instructions on how to remove a major FRU.
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ThinkPad P15 Gen 1/T15g Gen 1 Hardware Maintenance Manual
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