My PC was turning on and off every couple of seconds this morning. Unplugged everything, reseated RAM. Plugged everything back in, turned on and went to screen saying something about OC settings had failed to load, press F1 or F2, etc. Could not do anything with my keyboard though. Restarted and now PC stays on but nothing displays at all. Specs: Z97 mb, i5-4670k, 2x4gb RAM, 256 SSD, windows 10, r9 280x GPU. Any help is greatly appreciated!