Macbook pro won't reboot - what now?

My macbook pro is about 5 years old. Runs OSX 10.5.7 I believe. Hard drive has been racing on occasion, but it still worked. At least until today. I can't get it to reboot. Light turns on indicating its running, but screen remains blank and normal rebooting sound does not exist. What do I do?
Having to compose this on husband's PC.....gag.

When exactly did you buy it?
There was a series of MBPs that had bad video cards. They were produced in the end of 2007 to early 2008.
If just the hard drive died then you would still see something on the screen. Since you say all you see is the lights come on but nothing on the screen the drive might still be good, or usable, but something else in the computer is bad. Like the video card. To bad as the recall/repair for these systems with the bad video card only lasted for 4 years from Date Of Purchase.
It will cost you just as much, or close to, the cost of a new unit to fix the one you have. So run out and buy a new Mac so you don't have to use your husbands PC.
This response ws typed on a Dell i8200 that is 9+ years old and still running fine.

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<Edited By Host>

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see
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Macbook pro won't reboot - what now?

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