Sony VGC-RC110G - Manual (Page 140)

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Troubleshooting
What should I do if VAIO power indicator lights but my screen does not display anything
when I turn on my computer?
If nothing still appears on your screen after a while
1 Press the power button for more than four seconds to check that the VAIO power indicator goes out. Then turn on the
computer again.
2 If nothing still appears on your screen, unplug the power cord and leave the computer for about a minute. Then plug in
the power cord and turn on the computer again.