IBM 2274, User Manual

Page: 105 / 152

Preparing to work with the computer
101
Adding and removing hardware
This chapter contains basic information about:
• adding drives, memory, and adapter cards
• identifying system board components
• replacing the battery
These instructions do not contain complete information
about each option you can install in or remove from your
computer. Also, these instructions do not imply whether
the drive bays in your model are empty or populated at
the factory.
Preparing to work with the computer
Before you make any changes to hardware in your
computer, you must turn off and unplug the computer.
To disconnect
1 Turn off the computer and any attached devices that
have their own power switches.
2 Unplug all power cables from electrical outlets.
3 Disconnect all communication cables (such as
modem or network cables) from communication
outlets.
4 Disconnect all cables and cords from the computer;
this includes power cords, signal cables from external
devices, communication cables, and any other cables
attached to the computer.
Danger!
Electrical current from
power, telephone, and
communications cables is
hazardous. To avoid shock
hazard, use the steps
described in this section to
disconnect cables when
installing, moving, or
opening the cover of this
product.
Danger!
To avoid shock hazard, do
not connect or disconnect
any cables or perform
installation, maintenance,
or reconfiguration of this
product during an
electrical storm.