I have a dell 600m laptop. my hard drive crashed and I purchased a PATA 250GB hard drive, but when I turn on computer it goes to "series setup" screen, and under Primary had drive ist says "none". What do I do to get it to recognize new hard drive?
You need to go into the BIOS (usually press F2 when you apply power) to make sure your computer recognizes/detects the HDD. Assuming it does, you should be fine to re-install your operating system/apps from there.