Question No response from pc

[heatmikepark2]

Current rig: gtx 750ti, mobo dh55pj, cpu xeon x3450, 1333mhz ddr6gb ram.

I bought a new cooler (cooler master h410) to replace my intel stock cooler. My pc was working fine before this but after installation there is no response from MoBo. No fans working, nothing. Only this

View: https://youtu.be/7-ztH7DoF_Y

I tried re connecting the 24pin plug, same results.

 

[heatmikepark2]

Anyone? Here's the link if the video is not working.
H(ttps://youtu.be/7-ztH7DoF_Y) remove the brackets.

I am still stuck everything was fine few hours ago.