If you have more issues as you go use the steps below its what i have had to do in the past. Nice catch withe CPU Pins.
Does your Mobo have onboard video? If so use that when doing first setup. Then start with the baby steps.
1 stick of RAM and CPU with minimal fans to none if possible. No HD, sound card, add on cards, or video cards slotted or plugged. Once you know you can get to the BIOS and see things in it add components in 1 at a time. I go Memory first. Then HD, fans, and video card at the end.
it takes a bit longer, but it is wayyyy easier to figure out what you have plugged in wrong or what is not working, then guessing and trying random combinations.