do you have a speaker connected to the orange part of the front panel connector on the motherboard? are you getting any beeps?
step 17
http://www.tomshardware.com/forum/261145-31-perform-steps-posting-post-boot-video-problems
Canned Grounding Rant-
shut down system and remove side panel. with the power cable plugged into the PSU touch a bare unpainted metal area of the case. (my favorite spot is an unpainted screw securing the PSU) once you have grounded yourself you can unplug the computers power cable from the PSU and can touch the system.
if you move your feet, or shuffle in your chair, plug in the cord, reground yourself and unplug again.
end canned rant-
if your case does not have a speaker you can configure a temporary unit with scrap parts if you have them.
canned diagnostic speaker rant
The diagnostic speaker is the motherboards main diag feedback device.
the motherboard may be telling you where the problem is.
my speakers have this plug
http://images.crutchfieldonline.com/graphics/infolib/homelib/hSpeakerSpringClip.jpg
I use lamp wire but any stranded wire will do. literally any stranded wires. strip one end like so
http://www.antiquelampco.com/Shades/CordColors.jpg
attach the stripped end into the speaker spring clips on the speaker.
the other end of the wire should be trimmed like so the semi strip
https://wesbellwireandcable.com/images/cutwire.png
by doing a semi strip the wire case is now the socket.
plug one wire to the first pin, and the second onto the fourth pin.
power on the system and listen for beeps
end canned rant
while grounded it may be time to remove the ram sticks and re-insert them. the GPU may need to be removed and re-secured as well. while parts are removed look for any signs of damage, scorching, fans that do not spin, now would be the time to clean any fans too.