"The woods are lovely, dark and deep. But I have promises to keep, and miles to go before I sleep." - Robert Frost
Now it's been 10,000 years, Man has cried a billion tears, For what, he never knew. Now man's reign is through. But through eternal night, The twinkling of starlight. So very far away, Maybe it's only yesterday.
with the little experience i have i can only tell you to check if its not the backlight that is broken and the lcd is still working, since its so dark without backlight the monitor might look off but is indeed on, grab a flashlight and try to illuminate the inside of the screen and check for a faint image.
I once replaced all the electrolytic caps on a monitor and that brought it back to life, more than that i cant really help.