HDD no longer boots into Os after re-installation in pc case

QUICKSILV3R15

Honorable
May 30, 2016
20
1
10,525
Earlier today, I was working on my prebuilt iBuyPower system that I upgrded myself a while back. I was working on the cable management because it was so disorganized. When I got around to my sata cords, I disconnected them to tidy the cables up. After I put the whole system back together, the pc will no longer boot. It posts, detects the HDD and disc drive, then it takes me to a screen that says no boot device found. This is not a new HDD, as I have only had it since January of this year. I have tried multiple Sata cords, ports, and just about everything that I could think of. Here's what I observed: The pc will not detect either drive without power going to them so I doubt it's the PSU. I think I have narrowed it down to the HDD and the MOBO. Could someone please give me some insight on what to do at this point. I am out of options, so all suggestions are welcome.
MOBO: MSI 760GMA-P34(fx)
HDD: Western Digital Caviar Blue 1Tb
PSU: Antec High-Current Gamer 520w
I misclicked the "Pick as best answer button"
 
Solution
I found a solution to this problem. I had to create a live copy of windows 10 on a usb flash drive, and reinstall windows. My HDD had completely locked itself for some odd reason. I never hit or damaged my HDD while my cables where unplugged, so I am unsure of what caused this issue. My PC runs as good as new, but I still have to go through the 2.2TB infinity screen to boot into the OS.

QUICKSILV3R15

Honorable
May 30, 2016
20
1
10,525
I found a solution to this problem. I had to create a live copy of windows 10 on a usb flash drive, and reinstall windows. My HDD had completely locked itself for some odd reason. I never hit or damaged my HDD while my cables where unplugged, so I am unsure of what caused this issue. My PC runs as good as new, but I still have to go through the 2.2TB infinity screen to boot into the OS.
 
Solution