Troubleshooting Guide

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.