Computer date and time display is incorrect.
RTC (real-time clock) battery may need to be replaced.
prolongs the life of the RTC battery.
Cursor will not move using the arrow keys on the keypad.
Poor performance is experienced.
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.
Chapter 2 Troubleshooting
Connecting the computer to a live AC outlet
key may be on.
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
Hardware Reference Guide on the Documentation and
Diagnostics CD for instructions on installing a new battery, or
contact an authorized dealer or reseller for RTC battery
key. The Num Lock light should not be on
if you want to use the
disabled (or enabled) in Computer Setup.
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
Make sure fans are connected and working properly
(some fans only operate when needed).
Make sure the processor heatsink is installed properly.
Transfer data from the hard drive to create more space on the
Add more memory.
Defragment hard drive.
Restart the computer.
Run virus protection program.
key can be