Boot problem, getting worse and worse

Hi everyone,
My bottom fan on my PC was being very loud, so I opened up my case and unplugged the power supply, and flicked off the power switch on the back. I unscrewed the bottom fan and dusted it a little bit, and then I put it back together how it was before.

The part that I unscrewed also contained my hard drive, and now that it is reseated I cannot boot.


At first I got an error when booting:
Loading operating system . . .
disk boot failure, insert system disk and press enter.

THEN, I tried making sure everything was connected well and tight, and now I am not getting anything displayed on my screen.

Apologies for the lack of knowledge and thanks for the help.

Jeremy
 
It is possible that when you removed the fan and hard drive, you plugged the hard drives SATA cable into a different SATA port on the motherboard. Get into the bios, and make sure that the hard drive is being detected properly
 
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