But could it be the SATA Cable is going bad? I don't want to buy a new drive and have the same problem..... Does anyone know how to test?
You already tested it when you put back the original drive.
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The SATA cable is just fine. If it was going bad, your original Hard Drive would not work either.
^^^^^^^ This ^^^^^^^^^^
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I understand , but if you can return it then do so and buy one from those I listed.
I agree....