HELP!!! Cant boot computer with harddrive in

Jun 25, 2018
2
0
10
I rather not have to return my new hardrive if possible . I just build a new computer, and it took me a while to figure out that it was my harddrive (Seagate 2tb green). I finally got my system all set up, but I'm just running on a 250gb M.2 SSD. (I have harddrive in the SATA 2 port). But it wont even let me turn on the computer with it plugged in. Is it just dead, or can I do something???