Cpu and ram red light led did I mess up?

[Great_ever]

I'm new to pc building so I didn't really know anything but with videos and ish I got the hand of it however my doesn't boot up it turns on the fans are moving and everything theirs light on the orange lights on motherboard I never knew what the issue was so I just gave up trying to finish it that day. #18 being the internal connectors has a solid red flash that switches between my CPU/DRAM so I figure that's where the issue is but I don't know what exactly it is. I even went as far to buy a new ps4 cuz I didn't know what the issue was at first so now I'm trying to see what the issue is between the cpu and the ram. I don't have other ram to test out and quite frankly don't feel like purchasing more. The heatsink I used kinda when putting in the cooler I didn't get it on straight and it went onto the green parts of the cpu itself I'm not sure what to do and theirs no videos that have honestly helped me with my errors what do I do? I'm kinda frustrated I spent a lot of money for something to not work.

Cpu: I5 7600k
Cooler: H100i v2
Motherboard: Gigabyte h270-HD3
Graphics card: Evga Gtx 1060 SSC 6gb
Ram- Team elite plus 16 gb (2x8) DDR4.

 

[Great_ever]

My psu is a corsair cx550m 80+ bronze

 

[Jesse_20]

Make sure you have the 8 pin ATX power connected to the board as well as the 24 pin power connector. Failure to do so means the cpu cannot draw enough power to operate properly.

Other things to check:
-All connectors are connected, tight, and in the proper place.
-Ram is in the proper slots for 2 stick configuration. This means both sticks on the 'A' channel, or both on the 'B' channel. Labels should be on the board slots for ID purposes. Also check your board's RAM compatibility list to make sure it's been tested on this board.
-CPU is seated firmly in the correct orientation and the heatsink fan has been plugged in.
-Reset the cmos jumper to restore the bios to default.

If all of this checks out ok:
Remove EVERYTHING but PSU, CPU, and ONE stick of ram and try to boot.
If you still see error LED's on the mobo, then one of your components is bad. Only swapping with known good components will track down the issue at this point.

If the previous worked:
Add the rest of the components (drive, GPU, etc) with a reboot after each to ensure proper functionality before adding the next.
If a problem arises in this step, you know which part is causing the problems and we can continue from there.