New hard drive not showing on MacBook Start Up or Disk Utilities

Hi there,
I have read a lot of forum information in the last hour and I am not sure what direction to take.
I have a 2007 MacBook and my hardrive died so I have had a brand new Hitachi 5400rpm 1TB installed.
i am unable to format it as it is not appearing in Disc Utilities,
I am unable to select it as a start up disc as it is not showing (needs to be formated first?)
My external is not working when I try to backup from it.
Will I need another MAC as some forums suggest to format the new HD?
Thanks
K

An external disk drive enclosure can be had for just a few bucks, you can install the disk drive into it and connect it to your MacBooks USB port, like this http://www.newegg.com/Product/Product.aspx?Item=9SIA2C50T39109
Or just a cable to do the same thing like this http://www.newegg.com/Product/Product.aspx?Item=9SIA1PU0M68574
You mentioned "the company said it appeared on their external" again, what company? Did you install the drive yourself of have someone do it for you?

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Hi all,
So a few days ago my hard drive failed on me completely. And I didn't back up before that.
Yeah.
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mee2, Welcome to the Apple Discussions!
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This procedure is a diagnostic test. It makes no changes to your data.
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Copy the selected text to the Clipboard by pressing the key combination command-C.
Launch the built-in Terminal application in any of the following ways:
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New hard drive not showing on MacBook Start Up or Disk Utilities

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