My hp pavilion dv4 screen wont turn on but the cap, and num lock blink

My Hp pavilion dv4- 2145dx and my laptop screens stays black but the key board stays on like the caps lock and the number lock, the mouse, volume, and the wifi light they all turn on and so do the fans but the caps and num lock blink every second at this point i dotn know what to do can anyone help 

Hi,
First, try a Hard Reset as follows.
Shut down the notebook, unplug the AC Adapter and then remove the battery.  Hold  down the Power button for a full minute.  Re-insert the battery, plug in the AC Adapter and see if the notebook will start.
If it still doesn't start, is there a sequence to the 'blinks' that you can match to the table below?
Regards,
DP-K
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****Please mark Accept As Solution if it solves your problem****
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