Make sure it's plugged into the back of the graphics card like such

1) If it's plugged into GPU and still no signal, check the cable(s) and/or try a different monitor or a TV

2) Also check to make sure the correct cables are inserted.  Some graphics cards use DisplayPort, MiniDisplayPort, DVI, or HDMI

3) If not, reseat RAM, GPU, CMOS battery

4) If you're still having an issue with no signal, call support 305-971-1000