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Answered 2016-02-23 04:07:22

This could be due to a number of reasons.

1. Your power supply became unplugged or battery life died. Check to make sure it is plugged into an outlet and the battery still has about 20% left.

2. DVI or VGI cable came loose from the monitor. This would stop the monitor's functioning.

3. You bumped one of the F keys on the top of your keyboard that may of disabled your display.

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