HP COMPAQ DX2718 MT - Manual (Page 83)

Service Reference Guide 483941-001 D–3
Troubleshooting Without Diagnostics
Computer date and time
display is incorrect. RTC (real-time clock)
battery may need to be
replaced.
✎
MConnecting the
computer to a live
AC outlet prolongs
the life of the
RTC battery.
First, reset the Date and Time
Properties in the 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 Hardware Reference
Guide on the Library CD for
instructions on installing a new
battery.
Cursor will not move
using the arrow keys on
the keypad. The Num Lock key
may be on. Press the Num Lock key. The
Num Lock light should not be on if you
want to use the arrow keys. The Num
Lock key can be disabled (or
enabled) in Computer Setup.
Poor performance is
experienced. Processor is hot. 1. Ensure airflow to the computer is
not blocked. Leave a 4-inch (10.2-
cm) clearance on all vented sides
of the computer and monitor to
permit required airflow.
2. Ensure fans are connected and
working properly (some fans only
operate when needed).
3. Ensure the processor heatsink is
installed properly.
Poor performance is
experienced (continued). Hard drive is full. Transfer data from the hard drive to
create more space on the hard drive.
Low on memory. Add more memory.
Hard drive is fragmented. Defragment hard drive.
Program previously
accessed did not release
reserved memory back to
the system. Restart the computer.
Virus resident on the hard
drive. Run the virus protection program.
Too many applications
running. 1. Close unnecessary applications to
free up memory.
2. Add more memory.
Problem Cause Solution