Sony VGC-LT30 Series - Manual (Page 149)

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Troubleshooting
What should I do if the power indicator (Green) lights but my screen remains blank?
❑ If the orange DISPLAY OFF indicator is on, press the DISPLAY OFF button.
❑ Press any key on the wireless keyboard or the sleep button on the remote commander to bring your computer back into
Normal mode from Sleep mode.
❑ Press the Alt+F4 keys several times to close the application window. An application error may have been occurred.
❑ Press the Ctrl+Alt+Delete keys and click the arrow next to the Shut down button and Restart.
❑ Press and hold the power button for more than four seconds to shut down your computer. Unplug the AC adapter and
leave the computer for about five minutes. Then, plug in the AC adapter and turn on the computer again.
!
Make sure that the batteries of your wireless keyboard and remote commander are properly installed and not worn out.
Turning off your computer with the power button or the Ctrl+Alt+Delete keys may cause loss of unsaved data.