Computer will not respond to keyboard or mouse.
Cause Solution
CAUTION: When attempting to resume from Sleep state,
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.
System has locked up. Restart computer.
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.
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
Removal and Replacement section for instructions on
installing a new battery, or contact an authorized dealer or
reseller for RTC battery replacement.
To access Control Panel in Windows 7, select Start, and
then select Control Panel.
To access Control Panel in Windows 8.1, from the Start
screen, type c, and then select Control Panel from the list of
applications.
Cursor will not move using the arrow keys on the keypad.
Cause Solution
The Num Lock key is turned on. Press the Num Lock key. The Num Lock light must be off if
you want to use the arrow keys on the keypad. You can also
disable or enable the Num Lock key in Computer Setup at
Advanced > Device Options.
There is no sound or sound volume is too low.
Cause Solution
System volume may be set low or muted. 1. Check the Computer Setup 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.
Solving general problems 127
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