I should edit this post, since the problem was occurred again. After taking out main components from the server such as CPU, ram, power supply, I noticed that the problem was on the ram section. Having organized ram slots, it started without any problem. The solution is to take out main components and take in them again. It helps to detect which component is problematic. When adding new ram, pay attention on the slot order, compatibility such as frequency. If your server is not booting, at first check the ram section, since operating system can not be deployed or fetched. I hope this is informative for you.