Service manual

2. TROUBLESHOOTING
Service Manual CNS-9701 2.17
Keyboard Problem
Mouse Problem
Hard Disk Problem
Problem Possible Cause Action
The keyboard cable is loose at the
socket on the main board.
Disconnect the cable from the socket on
the main board and connect the cable to
the socket tightly.
No keyboard keys work.
The keyboard cable is damaged. Replace the keyboard with a new one.
Some keyboard keys do not
work.
Failure of the key switches. Replace the keyboard with a new one.
Problem Possible Cause Action
The hard disk is damaged. Replace the hard disk with a new one.A "No boot device" message
appears and Windows 2000 does
not start.
The BIOS setting is changed by
noise so the hard disk is not
recognized.
Set the correct BIOS setting again.
A "HDD Problem Call Nihon
Kohden" message appears and
the hard disk lamp is lit.
The hard disk is damaged. Replace the hard disk with a new one.
(To use the central monitor temporarily,
turn the main unit off and on. But note that
this problem will appear again some time.)
Following to the shut down
procedure in the operator's
manual, you shut down the
central monitor but the screen
does return to Windows 2000.
The hard disk is damaged. Replace the hard disk with a new one.
Metallic sound from the hard
disk.
The bearing for the spindle motor
in the hard disk is worn out.
Replace the hard disk with a new one.
CAUTION
To replace the hard disk with a new one, refer to “Hard Disk Flow” in
this section and “Replacing the Hard Disk” in Section 4 “Disassembly
and Assembly”.
Problem Possible Cause Action
The mouse cable is loose at the
socket on the main unit.
Disconnect the cable from the socket on
the main board and connect the cable to
the socket tightly.
When you move the mouse, the
cursor on the screen does not
move.
Mouse failure. Replace the mouse with a new one.