Hello everyone. I desperately need help. I just upgraded my computer today. Got a new cpu, motherboard, cooler, and ram. I upgraded from AMD to an Intel i7 6700k. My motherboard upgrade is a Gigabyte Z170-Gaming k3. I got a Hyper 212x cooler. And HyperX Fury 16Gb DDR4 Ram at 2400Mhz. I mounted all the hardware. Took me 4 hours. Got the motherboard on, cpu in. Thermal paste. Cooler. Ram. And then mounted my gpu back. Plugged in all the Sata cables. Pci-e cables. Cpu fan. Led's Cpu power cable. Usb cable. And motherboard power cable. After I plugged in my computer, and turned it on, it shut down after a few seconds. After that it was turning on by itself and shutting down repeatedly. (Im guessing self system check) and the screen was black didnt show anything. I was furious. I read some forums and some problems were that people didnt apply new thermal paste or didnt apply enough. After that I decided to reapply my thermal paste. It took me an hour to clean the paste off the cpu and heatsink. And took me an hour to get the 212 back on. I was tired and stressed. After that failed and the same thing happened. I though about it. I realized that when I turned on my computer, the lights that are supposed to flash when the hard drive is working werent flashing. I do not know if it could be that I plugged in the sata cables wrong. And I do not know if it could be the cause of this problem. Please help me and give me any suggestions you have. Im sorry that I wrote a whole essay but I wanted to explain my whole situation to get the most optical answers. Thank you. ☺