Logic Board Problems?

I turn my ibook on and i do not get any chime or display on the monitor, the only way i can know that it is on is the caps lock light goes on and off when i press it and the color of light on the power adapter changes from orange to green. I tried all the possible resets and such, no luck. What confuses me is, when this happened my laptop was just fine, I closed it, opened it like 2 minutes later and it was doing this...nothing.

Is it the logic board?