System Board, Connectors, and Error Messages C-3
3.
Touch and maintain continuous contact with an unpainted
metal surface of the computer system while handling or
touching any internal components, chips, add-on boards,
or disk drives.
Proper grounding surfaces inside the computer include
the disk drive mounting cage, the metal surrounding the
power supply, or unpainted portions of the computer’s
rear panel.
Connectors
System board external and internal connectors are described
in the following sections.
Rear Panel Connectors
The following table lists the external connectors on the rear
panel.
System Board External Connectors
Name
Function
PS/2 keyboard
Connects to your keyboard
PS/2 mouse
Connects to your mouse
USB (Universal Serial Bus)
Reserved for upgrades and
options with USB technology
Parallel port
Connects to an optional parallel
printer cable
Serial port 1
Connects to an optional serial
device
Serial port 2
Connects to an optional serial
device