Lenovo 3347XF2 Replacing devices, Static electricity prevention, Disabling the built-in battery

Chapter 6. Replacing devices

This chapter provides instructions on how to install or replace hardware for your computer.

•“Static electricity prevention” on page 49

•“Disabling the built-in battery” on page 49

•“Replacing the SIM card” on page 49

•“Replacing the hard disk drive or solid-state drive” on page 51

•“Replacing the keyboard” on page 53

•“Replacing a Mini PCI ExpressCard for wireless LAN connection” on page 57

•“Installing or replacing the wireless WAN card” on page 60

Static electricity prevention

Static electricity, although harmless to you, can seriously damage computer components and options. Improper handling of static-sensitive parts can cause damage to the part. When you unpack an option or a CRU, do not open the static-protective package containing the part until the instructions direct you to install it.

When you handle options or CRUs, or perform any work inside the computer, take the following precautions to avoid static-electricity damage:

•Limit your movement. Movement can cause static electricity to build up around you.

•Always handle components carefully. Handle adapters, memory modules, and other circuit boards by the edges. Never touch exposed circuitry.

•Prevent others from touching components.

•When you install a static-sensitive option or CRU, touch the static-protective package containing the part to a metal expansion-slot cover or other unpainted metal surface on the computer for at least two seconds. This reduces static electricity in the package and your body.

•When possible, remove the static-sensitive part from the static-protective packaging and install the part without setting it down. When this is not possible, place the static-protective packaging on a smooth, level surface and place the part on it.

•Do not place the part on the computer cover or other metal surface.

Disabling the built-in battery

Before replacing any CRU, ensure that you have disabled the built-in battery by doing 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 ThinkPad logo is displayed, press F1 to enter ThinkPad Setup.

3.Select Config ➙ Power. The Power submenu is displayed.

4.Select Disable Built-in Battery.

5.Click Yes in the Setup Warning window, then the computer will be turned off automatically. Wait three to five minutes to let the computer cool.

Replacing the SIM card

Before you start, print these instructions.

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