My 15" Macbook Pro, shuts down by it self (Random occurrence).

My 15" Macbook Pro, shuts down (randomly) by it self, some times it will not turn on, and some other times (very rarely) the fans go on “very loudly” the second I turn it on. But the computer, does not turn on at all, even with the battery fully charged and the fans runing full blast.
Some other times, it will not wake up. It will only turn on or wake up if connected to the power adapter, even if the battery is fully charged.
I have already reset (a couple times) de firmware, the smc and he pmu and the problem persists.
Al this goes on randomly and unpredictably. Some times it works just fine for 4 or 5 days and the suddenly something happens.
I also think that some times the computer runs extremely hot.
PLEASE HELP!!!!!!
[email protected]
15' MacBook Pro Mac OS X (10.4.8)

I have the same thing happening with a new macbook I bought my wife and I called apple today and after going back and forth between apple care and apple customer service they are shipping me out a new replacement macbook as it is less than 30 days since I bought it. I am waiting for their email with the Fed ex info so I can send this one back and then they will send out the new one.
If it is still in warranty I suggest you call Apple customer service and let them know how bad it is and insist on a new one!
This one also reboots at the slightest movement and it took me several tries to finally log in on it tonight to delete all the user accounts before I send it back!
Hopefully the replacement one is glitch free!
Powerbook G4 1 ghz Mac OS X (10.4.8)
Powerbook G4 1 ghz Mac OS X (10.4.8)

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