Troubleshooting
Quick troubleshooting
The computer is unable to start up
If the computer does not turn on when you press the power button, adequate power may not be available to the computer.
The following suggestions may help you determine why the computer will not start up:
■If the computer is plugged into an AC outlet, plug another electrical device into the outlet to be sure that the AC outlet is providing adequate power.
✎Use only the AC adapter provided with this computer or one approved for this computer.
■If the computer is running on battery power or is plugged into an external power source other than an AC outlet, plug the computer into an AC outlet using the AC adapter. Be sure that the power cord and AC adapter connections are secure.
The computer screen is blank
■If the power lights are blinking, the computer may be in Standby. To exit Standby, briefly press the power button.
■If the screen is blank, the computer may not be set to display the image on the computer screen. To transfer the image to the computer screen, press fn+f4.
The computer is on but not responding
If the computer is on, but not responding to software or keyboard commands, try the following emergency shutdown procedures in the sequence provided, until shutdown occurs:
ÄCAUTION: Emergency shutdown procedures result in the loss of unsaved information.
1.Press and hold the power button for at least 5 seconds.2.Disconnect the computer from external power and remove the battery.
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