HP Pavilion xf315 HP Pavilion Notebook PC ze1200 and xf300 Series - Startup Gu - Page 97

Troubleshooting and Maintenance Troubleshooting Techniques • If the operating time has gradually become shorter and the battery is more than a year or two old, you may need to replace the battery. • Heavy modem use or PC card use can affect battery operating time. • The battery gauge may need to be calibrated. Restart the notebook, 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 to complete. You cannot use the notebook during this time. If the Time Remaining for the battery seems incorrect • The Time Remaining is an estimate based on the rate at which the notebook is using power at that instant. So, if you check the Time Remaining while the notebook is using a good deal of power (such as when reading from a CD or DVD), the value will likely show less time remaining than you really have, since you will probably later switch to tasks that require less power. If the notebook doesn't go on standby as expected • If you have a connection to another computer, your notebook won't go on standby if the connection is active. • If the notebook is performing an operation, it normally won't go on standby until the operation is complete. • Use the BIOS configuration utility to make sure I/O Performance is set to Max Battery Life-see "To run the BIOS configuration utility" on page 102. If the notebook doesn't automatically hibernate as expected • Make sure hibernate support is enabled: click Start, Control Panel, Performance and Maintenance, Power Options, then click the Hibernate tab. Also, check the Power Schemes tab. Make sure the hibernation timeouts for AC power and battery power are not set to Never. • Use the BIOS configuration utility to make sure I/O Performance is set to Max Battery Life-see "To run the BIOS configuration utility" on page 102. Reference Guide 97