HP Rp5700 - Point of Sale System Reference Manual page 153

Table D-1 Solving General Problems (continued)
Cursor will not move using the
Cause
The Num Lock
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.
Virus resident on the hard drive.
ENWW
arrow keys on the keypad.
key may be on.
Solution
Press the Num Lock key. The Num Lock light should not be on
if you want to use the arrow keys. The
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 heatsink 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.
Run virus protection program.
Solving General Problems 143
Num Lock key can be