HP ProBook 6555b User Manual page 7

Troubleshooting ................................................................................................................. 56
Webcam (select models only) ............................................................................................................ 62
Adjusting webcam properties ............................................................................................. 62
5 Power management
Setting power options ......................................................................................................................... 64
Using power-saving states ................................................................................................. 64
Using the battery meter ..................................................................................................... 65
Using power plans ............................................................................................................. 65
Setting password protection on wakeup ............................................................................ 66
Using Power Assistant (select models only) ...................................................................................... 67
Starting Power Assistant .................................................................................................... 67
Using external AC power .................................................................................................................... 67
Connecting the AC adapter ............................................................................................... 68
Using battery power ........................................................................................................................... 69
Finding battery information in Help and Support ............................................................... 69
Using Battery Check .......................................................................................................... 69
Displaying the remaining battery charge ........................................................................... 70
Inserting or removing the battery ....................................................................................... 70
Charging a battery ............................................................................................................. 71
Maximizing battery discharge time .................................................................................... 72
Managing low battery levels .............................................................................................. 72
Calibrating a battery ........................................................................................................... 73
The optical disc tray does not open for removal of a CD, DVD, or BD ............. 56
The computer does not detect the optical drive ................................................ 57
A disc does not play .......................................................................................... 58
A disc does not play automatically .................................................................... 59
A movie stops, skips, or plays erratically .......................................................... 59
A movie is not visible on an external display ..................................................... 59
The process of burning a disc does not begin, or it stops before
completion ......................................................................................................... 59
A device driver must be reinstalled ................................................................... 60
Obtaining the latest HP device drivers ............................................. 60
Obtaining Microsoft device drivers ................................................... 60
Initiating and exiting Sleep ................................................................................ 64
Initiating and exiting Hibernation ....................................................................... 65
Viewing the current power plan ......................................................................... 66
Selecting a different power plan ........................................................................ 66
Customizing power plans .................................................................................. 66
Identifying low battery levels ............................................................................. 72
Resolving a low battery level ............................................................................. 73
Resolving a low battery level when external power is available ....... 73
Resolving a low battery level when a charged battery is
available ........................................................................................... 73
Resolving a low battery level when no power source is
available ........................................................................................... 73
Resolving a low battery level when the computer cannot exit
Hibernation ....................................................................................... 73
Step 1: Fully charge the battery ........................................................................ 73
Step 2: Disable Hibernation and Sleep ............................................................. 74
vii