Computer not recgonizing SATA hard drive anymore

So here's the problem I'm having. My computer was working just fine a few months ago, then I decided to move and put the computer into storage for a bit. Well, hooked it all back up and started it up. After starting, it took a very long time to load and when it went to boot it tried booting from the CD-ROM and with no bootable media disk, it wasn't able to load.

I made sure all the connections were still good and everything was clean and re-booted. Same problem. I then checked the BIOS and noticed that my hard drive was no longer recognized as a bootable drive.

My computer setup:
Gateway FX6800-01E
Intel I-7 Quad 920 2.67GHz
3g DDR3 RAM
Seagate 750GB SATA HD
Vista Home Premium

I cant think of anything that could have happened to get rid of the HD as a bootable drive and any help to resolve this would be much appreciated.
 
Whether it is related to being moved I don't know, but it could be the hard drive has failed.
 
Multi-platter hard drives can suffer failures from shocks bit while you moved your PC. There is a good chance it probably has failed, however, if you can, you may try to hook up to another PC and see whether it is not detected there is as well or otherwise.
 
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