Screen turns black for 2-3 seconds

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Rishu - Oct 19, 2016 at 10:27 AM
Hello,

I have HP ProBook 450g3 my laptop screen turns black for 2-3 seconds and get back on normal screen, and it repeats. There is no such time it could happen at any time when I work. And screen after going back it comes on normal screen with no loss of any data or shutting down any pge.

Pls......help me to solve my problem