Boot up issue

[Tommy_17]

So I did a slight upgrade to my rig with adding a new gtx 970 graphics card and a new case that's it. Before the upgrade my computer did fine with booting up windows, but now it won't. It starts up and everything, but i get to the screen saying in need a proper boot device. Help

 

[LouBraun]

Make sure that the hard drive that was in t he old case got properly installed and that the SATA cable and power cables are connected and fully seated. Your computer should auto-detect the hard drive if it is correctly connected.