2007 Mac Book pro Shuts down at startup attempt. Tried reloading OSX and will not start up after that.

My Mac Book Pro started having issues. I tried to relaod the operating system and it worked for a moment. When I tried to do a time machine back up it failed.
Now itr Shuts down at startup attempt. Tried reloading OSX and will not start up after that.

Dr.Conga,
did you try to do a Time Machine backup from your MacBook Pro, or a Time Machine restoration to it?
Are you trying to reload your current version of OS X (10.7.4, to judge from your signature), or are you trying to reload the version of Mac OS X that came on the grey installation DVDs that originally came with your MacBook Pro?

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