Chapter 6. Replacing Devices; Static Electricity Prevention; Replacing The Battery - Lenovo ThinkPad Edge E420 1141 User Manual

Chapter 6. Replacing devices

You can increase the capacity of the memory or the hard disk drive by replacing the original, built-in
device with an optional one. Or, if you need to, you can replace the PCI Express Mini Card by following
the procedures in this section.
• "Static electricity prevention" on page 77
• "Replacing the battery" on page 77
• "Replacing the hard disk drive" on page 79
• "Replacing the optical drive" on page 82
• "Installing and replacing the PCI Express Mini Card for wireless WAN" on page 86
• "Installing and replacing a PCI Express Mini Card for wireless LAN/WiMAX connection" on page 90
• "Replacing memory" on page 93
• "Replacing the keyboard" on page 95
• "Replacing the SIM card" on page 103

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 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.

Replacing the battery

Before you start, print these instructions.
This system may not support batteries that are not genuine Lenovo-made or authorized. These systems will
continue to boot, but may not charge unauthorized batteries.
Attention: Lenovo has no responsibility for the performance or safety of unauthorized batteries, and
provides no warranties for failures or damage arising out of their use.
To replace the battery with a new one, read the following prerequisites.
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