Dell XPS m1530 not booting up

Hey guys i need some assistance, i have a dell xps m1530 which i purchased in 2009 has 3gb of memory and running windows 7. Up until recently everything was working smoothly and one night i went to turn it on, the blue lights flashed and heard the laptop come on but have total black screen. Not boot screen, i have tried pressing fn and the power button at the same time and i get no type of message. Any ideas on whats the cause and if is it even worth fixing it?
 
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