HP Compaq Elite 8300 All-in-One Maintenance & Service Manual page 119

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.
Cursor will not move using the
Cause
The Num Lock key may be on.
There is no sound or sound volume is too low.
Cause
System volume may be set low or muted.
Poor performance is experienced.
Cause
Processor is hot.
Hard drive is full.
Low on memory.
Hard drive fragmented.
Program previously accessed did not release reserved
memory back to the system.
arrow keys on the keypad.
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 Removal and Replacement section for instructions
on installing a new battery, or contact an authorized dealer or
reseller for RTC battery replacement.
Solution
Press the Num Lock key. The Num Lock light should not be
on if you want to use the arrow
be disabled (or enabled) in Computer Setup.
Solution
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.
Solution
1. Make sure airflow to the computer is not blocked. Leave
a 10.2-cm (4-inch) clearance on all vented sides of the
computer and above the monitor to permit the required
airflow.
2. Make sure fans are connected and working properly
(some fans only operate when needed).
3. Make sure the processor heat sink is installed properly.
Transfer data from the hard drive to create more space on
the hard drive.
Add more memory.
Defragment hard drive.
Restart the computer.
Solving general problems 111
keys. The Num Lock key can