I ordered a new harddrive for my old computer and it just won't work but the strange thing is when I put my old harddrive into it it boots just fine the other one the computer just won't read
Wonder: Is your "old" computer like ATA33/66 and the HDD is ATA100... if its dead then it wouldnt be spinning, or would be making funny noises. ifit doesnt start up at all then its dead. put your old HDD in and put the new one in as a slave. see what happens