Intermittent Problems Action
A problem occurs
only occasionally and
is difficult to detect.
Verify that:
1. All cables and cords are securely connected to the rear of the
computer and attached devices.
2. When the computer is turned on, the fan grill is not blocked
(there is air flow around the grill), and the fans are working.
If airflow is blocked or the fans are not working, the computer
might overheat.
3. If an optional SCSI adapter and SCSI devices are installed, the
last external device in each SCSI chain is terminated correctly.
(See your SCSI documentation.)
If the problem cannot be isolated and corrected, have the computer
serviced.
Keyboard, Mouse,
or Pointing-
Device Problems
Action
All or some keys on
the keyboard do not
work.
Verify that:
1. The computer and the monitor are turned on.
2. The keyboard cable is securely connected to the keyboard
connector on the computer. For the location of the keyboard
connector, see “External Connectors” on page 10.
If the problem cannot be isolated and corrected, have the keyboard
and computer serviced.
The mouse or
pointing device does
not work.
Verify that:
1. The mouse or pointing-device cable is securely attached to the
proper connector on the computer. Depending on the type of
mouse you have, it will connect to either the mouse or serial
connector. To find the mouse and serial connectors, see
“External Connectors” on page 10.
2. The device drivers for the mouse are installed correctly.
If the problem cannot be isolated and corrected, have the computer
and the device serviced.
Chapter 5. Solving Problems 91