Sony VGC-LS1 - Manual (Page 124)

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Troubleshooting
What should I do if the power indicator (Green) lights but my computer screen stays
blank?
❑ If the orange MONITOR OFF indicator is on, press the MONITOR OFF button.
❑ Otherwise, follow these steps:
1 Press and hold the power button for more than four seconds to check that the power indicator goes out. Then turn on
your computer again.
2 If your computer screen still stays blank, unplug the AC adapter and leave the computer for about five minutes. Then
plug in the AC adapter and turn on the computer again.