Recently I built my own gaming pc. I assembled it and turned it on and the computer appeared to start up, but I hadn't yet plugged it into any monitor to check if it actually booted the bios. This is my build: http://pcpartpicker.com/p/W3pG . I decided to use a graphics card which I already had been using, a sapphire hd 7770 vapor-x(which had been working perfectly when I tried it just days ago). Once I plugged the gpu into my monitor and booted up the pc, there was no signal. I attempted switching the card to a different pci slot, but it still didn't work, I also attempted switching from DVI to HDMI (on a different monitor) and still there was no signal. All the case fans turn on, the motherboard seems to have power, even the gpu fans run. I was wondering if there is any possible solutions I can try before I rebuild the entire thing or try to get my hands on different graphics card to check if that is the source of my troubles. Any help is appreciated.