Panel Monitor

I turned my flat panel monitor off and it will not turn back on?
I turned it off and about an hour later it would not turn back on…The monitor is only a year and a half old from dell. Can it be fixed or do i need a new monitor.
Check first the connections, it may happen for you to have unplugged the power cable off. second check the contrast it may be set all the way to dark (maybe as a prank by some one(or by accident)), Also on some Monitors on the back side there is a switch a button for reset.
HP w2207 22″ Widescreen Flat Panel Monitor