As you can see in the picture, my hard drive is not recognized all of a sudden. I am running an Alienware X51 R1 desktop computer, and the hard drive in question is a Seagate Barracuda 1000GB, model ST1000DM003. I thought the hard drive went bad so I replaced it with a new Seagate Barracuda, model ST1000DM010. It is showing the same response. So I'm thinking maybe a plug got knocked loose, but I can't find anything loose inside of my computer case. I do think it's odd though that when I have the hard drive plugged in there is a 4-pin plug that is not occupied (says "Molex" under if it that matters). Maybe that is the power supply to the hard drive and that is why it isn't recognizing it? Any help here would be great!
https://imgur.com/a/mq5JM8E
Thanks!!
https://imgur.com/a/mq5JM8E
Thanks!!