Solving Minor Problems - HP Dx5150 - Compaq Business Desktop Reference Manual

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 unsaved data.
Computer date and
time display is
incorrect.
Computer appears to
pause periodically.
Cursor will not move
using the arrow keys on
the keypad.
Devices connected to
USB ports do not
operate.
Cannot remove
computer cover or
access panel.
D–2
Cause
Software control of the
power switch is not
functional.
Computer is in
standby mode.
System has locked up.
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.
The Front Panel USB Port
may be disabled in
Computer Setup. This
option controls the front
USB port and the two USB
ports on the back of the
computer under the NIC
connector.
Smart Cover Lock,
featured on some
computers, is locked.
361685-001
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.
Restart computer.
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.
Enable the Front Panel USB Port in
Computer Setup. If the problem
persists, contact an authorized
service center.
1. Unlock the Smart Cover Lock
using Computer Setup.
2. Use the Smart Cover FailSafe
Key in case of forgotten
password, power loss, or
computer malfunction.
Service Reference Guide, dx5150