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Troubleshooting Without Diagnostics
Solving Minor Problems
Solving Minor Problems
Problem
Computer appears
locked up and will not
turn off when the power
button is pressed.
Computer will not
respond to USB
keyboard or mouse.
Ä
CAUTION: When attempting to resume from standby mode, do not hold down the power
button for more than four seconds. Otherwise, the computer will shut down and you will lose
your data.
Computer date and
time display is incorrect.
Computer appears to
pause periodically.
Cursor will not move
using the arrow keys on
the keypad.
Poor performance is
experienced.
D–2
Cause
Software control of the
power switch is not
functional.
Computer is in
standby mode.
RTC (real-time clock)
battery may need to be
replaced.
Network driver is loaded
and no network
connection is established.
The Num Lock key
may be on.
Processor is hot.
Hard drive is full.
360201-002
Possible Solution
1. Press and hold the power button
for at least four seconds until the
computer turns off.
2. Disconnect electrical plug from
outlet.
Press the power button to resume from
standby mode.
1. Reset the date and time under
Control Panel.
2. Replace the RTC battery.
Establish a network connection, or
use Computer Setup or Microsoft
Windows Device Manager to disable
the network controller.
Press the Num Lock key. The Num
Lock key can be disabled (or
enabled) in Computer Setup.
1. Ensure airflow to the computer is
not blocked.
2. Ensure the fans are connected
and working properly (some fans
only operate when needed).
3. Ensure the processor heatsink is
installed properly.
Transfer data from the hard drive to
create more space on the hard drive.
Service Reference Guide, dc5000
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