Screen turns black for 2-3 seconds

Rishu - Oct 19, 2016 at 10:27 AM

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. me to solve my problem