Need Assistance! HDD error.

kit91

Prominent
Jan 6, 2018
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I just recently moved my wife's PC components from her old case, to a new case. I had changed almost nothing other than new wiring to the motherboard for the new case. As far as I am aware nothing should of changed but now, whenever I try to boot the HDD with windows on it, nothing happens except an underscore ( _ ) appears on the screen moves to the middle of a black screen. After that it goes straight back to BIOS and I can't figure out why.

Motherboard Model: ASUS Z87-A Motherboard.
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UPDATE!

Okay after further investigation we have discovered the HDD with windows seems to be at some kind of fault. I plugged in another HDD with windows as a temporary solution.

The HDD shows as being plugged in, but we can't access the data within it.

Any help would be appreciated.