HP pavilion n5400 Manuale Di Servizio

 

Solving Problems with Your Computer 

 Troubleshooting 

Techniques 

  

Reference 

Guide 

105 

Power and battery problems 

If the computer turns off immediately after it turns on 

•  Battery power is probably extremely low. Plug in the AC adapter or insert a newly 

charged battery. 

If the computer keeps beeping 

•  The computer beeps repeatedly or displays a warning when the battery is low. Save 

your work, shut down the computer immediately, and insert a charged battery or plug 
in the AC adapter. 

If the computer has a short operating time 

•  Try conserving power by setting power timeouts to shorter periods. In Windows, you 

can adjust these settings in the Power Management (or Power Options) Properties 
window in Control Panel. 

•  If you are running any applications with an automatic save feature, such as MS Word 

for Windows, you can extend the save time or disable this feature to reduce hard disk 
access.  

•  If the operating time has become shorter and the battery is more than a year or two 

old, you may need to replace the battery. 

•  Set the display brightness to the lowest comfortable level. 
•  Heavy modem use can affect battery operating time. 
•  PC card use can affect battery operating time. 
•  The battery gauge may need to be calibrated. Restart the computer, press F6 when the 

HP logo appears, and follow the instructions that appear onscreen. This process 
calibrates the battery, and requires four to five hours. You cannot use the computer 
during this process. 

If the battery doesn’t charge 

•  Make sure the AC adapter is plugged into the power source and that the light on the 

adapter is on. 

•  If you're using a power strip, remove the AC adapter from the power strip and plug it 

directly into a wall outlet. 

•  Make sure the battery is fully installed and locked in place.