HP Pro 3000 SFF Maintenance And Service Manual page 155

Table C-1 Solving General Problems (continued)
There is no sound or sound volume is too low.
Cause
System volume may be set low or muted.
Cannot remove computer cover or access panel.
Cause
Smart Cover Lock, featured on some computers, is locked.
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.
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
Unlock the Smart Cover Lock using Computer Setup.
The Smart Cover FailSafe Key, a device for manually
disabling the Smart Cover Lock, is available from HP. You
will need the FailSafe Key in case of forgotten password,
power loss, or computer malfunction. Order PN 166527-001
for the wrench-style key or PN 166527-002 for the
screwdriver bit key.
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 145