Apologies if this is a duplicate question.
I have built a new computer, and all cables appear to be in the correct place. It powers up, the fans spin, there is a single short beep (like what you normally here on a computer) then the fans slow right down and I get no display on my monitor (which is actually a 42 inch television with a pc port).
I believe the graphics signal is sending as when cycling through the source options on my tv it picks up pc which it wouldnt if not connected.
I am using a 500w PSU coolermaster. My motherboard is a gigabyte ga-b75-d3v (not the b75m-d3v version). I have 8 gb of ddr3 1600mhz corsair vengeance ram (2*4gb sticks) (both sticks are in the white channels slots 1&3 I believe). An intel i7 3770 CPU. Normal onboard graphics as well as an old 256mb ATI GPU (cant tell you any more than that as I cannot identify further). I will add a Sapphire Radeon HD 7770 but have not connected it yet. One corsair agility 3 ssd 120gb.
Could anybody advise me on what the issue may be and where I can start testing for issues?
Thank you in advance for your help.