Article ID : S500020347 / Last Modified : 11/04/2018

No video output before boot

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No Video Before Boot.

1) Verify Contrast and Brightness LCD sreen controls are set appropriate.
2) Connect an external monitor to the VAIO and test the monitor, if applicable.
3) Verify if hardware or software had been installed prior to the problem. If hardware or software was installed, uninstall and test screen