My hp tx1000 have black screen problem

Hello,

i already try to heat using hair dryer at the nvidia gpu n it work for 1 hour. After that it died n i try to turn it on n black screen again. i heated it again but it not working now. Now i have new problem, it won't turn on, when i turn it on, in 2 seconds it died.

please help me... i need that laptop to work....