HP dx2390 Quick Setup and Getting Started Guide - Page 18

Solving General Problems continued, CAUTION

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Table 1 Solving General Problems (continued) Computer appears locked up and will not turn off when the power button is pressed. Cause Solution Software control of the power switch is not functional. 1. Press and hold the power button for at least four seconds until the computer turns off. 2. Disconnect the power cord from the electrical outlet. Computer will not respond to USB keyboard or mouse. Cause Solution System has locked up. Restart computer. Keyboard or mouse is not connected to computer. Connect keyboard and mouse cables to computer. Computer is in standby mode. To resume from standby mode, press the power button or press any key. 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 any unsaved data. Computer date and time display is incorrect. Cause RTC (real-time clock) battery may need to be replaced. NOTE: Connecting the computer to a live AC outlet prolongs the life of the RTC battery. Solution 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 for instructions on installing a new battery, or contact an authorized dealer or reseller for RTC battery replacement. Cursor will not move using the arrow keys on the keypad. Cause Solution The Num Lock key may be on. Press the Num Lock key. The Num Lock light should not be on if you want to use the arrow keys. The Num Lock key can be disabled (or enabled) in Computer Setup. 10 Quick Setup & Getting Started ENWW

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Computer appears locked up and will not turn off when the power button is pressed.
Cause
Solution
Software control of the power switch is not
functional.
1.
Press and hold the power button for at least
four seconds until the computer turns off.
2.
Disconnect the power cord from the electrical
outlet.
Computer will not respond to USB keyboard or mouse.
Cause
Solution
System has locked up.
Restart computer.
Keyboard or mouse is not connected to computer.
Connect keyboard and mouse cables to computer.
Computer is in
standby
mode.
To resume from
standby
mode, press the power
button or press any key.
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 any
unsaved data.
Computer date and time display is incorrect.
Cause
Solution
RTC (real-time clock) battery may need to be
replaced.
NOTE:
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
for instructions on
installing a new battery, or contact an authorized
dealer or reseller for RTC battery replacement.
Cursor will not move using the arrow keys on the keypad.
Cause
Solution
The
Num Lock
key may be on.
Press the
Num Lock
key. The Num Lock light
should not be on if you want to use the
arrow
keys.
The
Num Lock
key can be disabled (or enabled) in
Computer Setup.
Table 1
Solving General Problems (continued)
10
Quick Setup & Getting Started
ENWW