My 2009 macbook wont turn on....When i press the power button all i hear is the fan tryin to start...and thats optical chime... I have tried the following

Rest the pram
Reset the power mangement

Do you think its realted to the nvida chip set?
The guy at the apple dealership said it was an easy fix..but wanted to charge me 300.00?? Any advice to what might be the problem would be more than appreicated..