Please list all components: >>Posting Guide<<
Try to boot with a single stick of RAM in DIMM 2.
No hard drives or any other parts. Just ram, cpu, cooler, psu.
Prior to the test, re-seat the cpu and inspect the cpu socket pins with a bight light and magnifying glass or hd zoom.
If it works with the single stick of ram, test each stick by itself in this manner. If they all work then try DIMM 2 & 4 then all of them again.