HP Dx5150 Troubleshooting Guide - Page 22

Solving General Problems

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Troubleshooting Without Diagnostics Solving General Problems You may be able to easily resolve the general problems described in this section. If a problem persists and you are unable to resolve it yourself or if you feel uncomfortable about performing the operation, contact an authorized dealer or reseller. Solving General Problems Problem Cause Solution Computer appears locked up and will not turn off when the power button is pressed. Software control of the power switch is not functional. Press and hold the power button for at least four seconds until the computer turns off. Computer will not respond to USB keyboard or mouse. Computer is in standby mode. Press the power button to resume from standby mode. System has locked up. Restart computer. 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. RTC (real-time clock) battery may need to be replaced. ✎ Connecting the computer to a live AC outlet prolongs the life of the RTC battery. First, reset the date and time under Control Panel (Computer Setup can also be used to update the RTC date and time). If the problem persists, replace the RTC battery. See the Hardware Reference Guide on the Documentation CD for instructions on installing a new battery, or contact an authorized dealer or reseller for RTC battery replacement. Devices connected to USB ports do not operate. 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. Enable the Front Panel USB Port in Computer Setup. If the problem persists, contact an authorized service center. 2-6 www.hp.com Troubleshooting Guide

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2–6
www.hp.com
Troubleshooting Guide
Troubleshooting Without Diagnostics
Solving General Problems
You may be able to easily resolve the general problems described in
this section. If a problem persists and you are unable to resolve it
yourself or if you feel uncomfortable about performing the operation,
contact an authorized dealer or reseller.
Solving General Problems
Problem
Cause
Solution
Computer appears
locked up and will not
turn off when the power
button is pressed.
Software control of the
power switch is not
functional.
Press and hold the power button for
at least four seconds until the
computer turns off.
Computer will not
respond to USB
keyboard or mouse.
Computer is in
standby
mode.
Press the power button to resume
from
standby
mode.
System has locked up.
Restart computer.
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.
RTC (real-time clock)
battery may need to be
replaced.
✎
Connecting the
computer to a live
AC outlet prolongs
the life of the
RTC battery.
First, reset the date and time under
Control Panel
(Computer Setup
can also be used to update the
RTC date and time). If the problem
persists, replace the RTC battery. See
the
Hardware Reference Guide
on
the
Documentation
CD
for instructions
on installing a new battery, or
contact an authorized dealer or
reseller for RTC battery replacement.
Devices connected to
USB ports do not
operate.
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.
Enable the Front Panel USB Port in
Computer Setup. If the problem
persists, contact an authorized
service center.