Instant sleep mode

[Neurenemmyy]

Hey, so a bit ago I got a computer. I wanted to add a new gpu, so I did. I bought a GTX 750 TI 2gb. It didnt fit the case so naturally I switched cases. But now for some reason the back isnt working? Like, i plugged my keyboard, mouse, and monitor into the back usbs (the ones on the front of the case dont work--- i havent figured out where to plug them into) anyways, im using the ones that are connected to the motherboard. All fans are running and everything seems to be working fine. I also added a fresh 1tb HDD with no OS or anything. But it just seems like the back is well, just not working. Ive been at it for days and Im completely stuck. Any ideas?

Update: ive tried to take 1 ram stick out at a time. Still nothing. I realized my mouses lazer flashes on for about half a second when i first start up the pc. 

Edited December 3, 2017 by Neurenemmyy

[Zmax]

Have you install the IO shield

[Neurenemmyy]

35 minutes ago, Redstoneary said:

What do you need help with?

Figuring out why the back isnt working, and why my monitor isnt detecting my pc

[Neurenemmyy]

It seems as if everythings working except the back panel. The usbs/monitor inputs arent working. My mouse lazer will only go on for about half a second then off. Im not sure what to do.