HDD not being detected by MOBO

[Atomic Rooster]

Hmm . . . Does the video card have a power plug that was disconnected? That could cause the video to go blank at Windows start up.

 

[setishock]

If you connected the power to the drive while the computer was on you may have damaged the drive's controller board. Rma the drive.

 

[Atomic Rooster]

Not necessarily. Most, if not all SATA drives are hot swappable. Which means you connect and disconnect them while the system is running.

 

[Raffaz]

Can you boot into safe mode?