So i recently finished building this rig over the past few months looking fir the best parts for the best prices. I installed all of my components as New parts except for the hardrive which i scrapped from my old computer. I go to turn it on while its connected to the hdmi out from the mobo and it keeps saying no signal. I never even saw the motherboard's logo on start up. I've checked the cables and they all seem fine from close inspection. My motherboard is a gigabyte z87mx-d3h and the processor is an Intel core i5 4670k. The old harddrive is a seagate baraccuda 500gb that i want to format to use in this system. Can anybody help me with this problem? if you want more info on my rig i will be more that happy to describe more. Any help will be greatly ...... i mean greatly appreciated.