My laptop doesnt boot!

Powersuply works perfectly, checked that.

My laptop starts for 1 second, the fan starts and then poof turned off again.

Can anybody help me out?!

Does the lights go on ? and you get a black screen ??
If so it seems that it is the "nvidia defect" - this simmilar to this thread http://www.daniweb.com/forums/thread303519.html
if it is under warrenty send it back for repair , you might need to press your case - there is even a class suing of HP for this and many forums out there

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