HP pavilion xh500 Manuale Di Servizio

Solving Problems with Your Computer 
Troubleshooting Techniques 

96 Reference 

Guide 

•  Make sure the fan is working properly. 
•  Keep in mind that charging the battery and running games and other programs that 

drive CPU usage toward 100% can increase the computer’s temperature. 

You may also want to test the fan with diagnostics. See “Testing Hardware Operation” 
on page 111. 

Keyboard, touch pad, and mouse problems 

If the touch pad is difficult to control 

•  Customize the touch pad by modifying Mouse properties: click Start, Control Panel, 

Printers and Other Hardware, Mouse. 

If the pointing devices don’t work 

•  Don’t touch the touch pad while booting or resuming. If this happens, try the 

following: 

•  Press a key on the keyboard to restore normal operation. 
•  Suspend and resume operation using the blue standby button. 

•  Restart the computer: click Start, Turn Off Computer, Restart. 

If an external mouse doesn’t work 

•  Standby or shut down the computer before you attach the mouse, to ensure that it will 

be detected properly. 

If you want to go back to using the touch pad, you must standby or shut down the 
computer before you detach the mouse.  

If the embedded numeric keypad doesn’t work 

•  Make sure Num Lock is on—that you have pressed Fn+F8 to activate the numeric 

keypad and that you have pressed the Lock key to turn on number lock. 

•  Don’t touch the touch pad while booting or resuming—see above. 

If a special feature on a PS/2 mouse doesn’t work 

•  Make sure you installed any drivers included with the mouse. 
•  Restart the computer, so that the system will detect the PS/2 mouse: click Start, Turn 

Off Computer, Restart.