When i start my computer, all the lights turn on, fans start going, everything seems fine, but then my monitor doesnt show anything. The monitor turns on, but says there's no signal. Ive replaced the power supply, and I know its not the motherboard because i RMAed it. i know its not the monitor, becuase ive tried another. I also got a new cable for the monitor, so its not that. Im thinking it's the memory or the cpu, but i know i havent done anything to ruine those things. (maybe i have, this is my first build)
Hmm, weird. And you are sure that your motherboard is OK?
Try removing your graphics card from the computer, then reset the BIOS of your motherboard, and try to start your computer again with the monitor connected to the onboard gpu.