Intel DB85FL boot problem. Plz watch the Video prob_1(1)

Version 1

    I bought intel DB85FL motherboard.After some weeks, whenever i started the computer the CPU would start then it stops and then starts again but i didnt see any Picture on monitor.I had to hold the power button to turn it off.Then again 1/2 tries the same thing happens but this time i Can see the picture .My Gfx,processor,psu,ram r fine.

    I changed it and got a new one the same problem with the new one.What shud i do?