Solving Minor Problems - HP Compaq dc5700 MT Reference Manual

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.
Computer date and
time display is incorrect.
Computer appears to
pause periodically.
Cursor will not move
using the arrow keys on
the keypad.
There is no sound or
sound volume is too
low.
Service Reference Guide, dc5700
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.
✎
Connecting the
computer to a live
AC outlet prolongs
the life of the RTC
battery.
Network driver is loaded
and no network
connection is established.
The Num Lock key
may be on.
There is no sound or
sound volume is too low.
437804-001
Troubleshooting Without Diagnostics
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 or press any
key to resume from standby mode.
Ä 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.
Restart computer.
1. Reset the date and time under
Control Panel. Computer Setup
can also be used.
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. Check the F10 BIOS settings to
make sure the internal system
speaker is not muted (this setting
does not affect the external
speakers).
2. Make sure the external speakers
are properly connected and
powered on and that the
speakers' volume control is set
correctly.
3. Use the system volume control
available in the operating system
to make sure the speakers are not
muted or to increase the volume.
D–3