Sony VGX-TP1 - Manual (Page 117)

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Troubleshooting
What should I do if the power indicator lights but my screen stays blank?
❑ Make sure the proper input for your display (TV, VGA, DVI-D monitor) is selected.
❑ Make sure your display (TV, VGA, DVI-D monitor) is turned on.
❑ If your display is still blank, follow these steps:
1 Press the power button on your computer for more than four seconds to check that the power indicator goes out. Then
turn on your computer again.
2 If your display still stays blank, unplug the power cord and leave the computer for about a minute. Then plug in the
power cord and turn on the computer again.
!
Turning off your computer with the power button may cause loss of unsaved data.