HP Pavillio Dv 2000

Hello, My HP Pavillion Dv 2000 has the problem tha when I turn it on all blue ligths are shining but the screen remains black. Technitian here In Lima, PERO told me tha is the main bord that has a nopne reparable error and that changon a main bord it will solvce the proble. Do you know where can I find a main bord and how much will it cost, and the second questin is it worth value changing the main bord_