HP Pro 3000 SFF Maintenance And Service Manual page 156

Table C-1 Solving General Problems (continued)
Poor performance is experienced.
Cause
Too many applications running.
Some software applications, especially games, are stressful
on the graphics subsystem
Cause unknown.
System does not power on.
Cause
System unable to power on.
146 Appendix C Troubleshooting Without Diagnostics
Solution
1. Close unnecessary applications to free up memory.
2. Add more memory. Some applications run in the
background and can be closed by right-clicking on their
corresponding icons in the task tray. To prevent these
applications from launching at startup, go to Start >
Run (Windows XP) or Start > Accessories > Run
(Windows Vista) and type msconfig. On the Startup
tab of the System Configuration Utility, clear
applications that you do not want to launch
automatically.
1. Lower the display resolution for the current application
or consult the documentation that came with the
application for suggestions on how to improve
performance by adjusting parameters in the application.
2. Add more memory.
3. Upgrade the graphics solution.
Restart the computer.
Solution
Press and hold the power button for less than 4 seconds. If
the hard drive LED turns green, then:
1. Check that the voltage selector, located on the rear of
the power supply on some models, is set to the
appropriate voltage. Proper voltage setting depends on
your region.
2. Remove the expansion cards one at a time and see if
the system powers on.
3. Replace the system board.
OR
Press and hold the power button for less than 4 seconds. If
the hard drive LED does not turn on green then:
1. Check that the unit is plugged into a working AC outlet.
2. Open hood and check that the power button harness is
properly connected to the system board.
3. Check that both power supply cables are properly
connected to the system board.
4. Replace the power button harness.
5. Replace the power supply.
6. Replace the system board.