Okay. At first, check device manager if there are any problems indicated, also check if the drive is properly recognised.
If all is okay, then do the final check:
Get a bootable disc, insert into your drive and see if you can boot your computer from that disc. Please note, in case you are using a Windows install disc, you may need to press a key in order to start from the disc. So watch the screen output carefully.
If that test fails, then the drive is considered dead.