iBook G4 Problems

I have an iBook G4 for a bit over three years. In the last six months it has been giving me a lot of problems. Sometimes when I work on it (charged, it's not a matter of battery) it shuts down randomly and sometimes it won't turn on for at least a month. Sometimes it turns on when it feels like it (randomly when I try), sometimes it doesn't. When it DOES turn on, it eventually shuts down again after either a few minutes or a few hours or a few days. Is my laptop dying? (Right now it isn't working) Or is there anything I can do?

Sounds like your logic board has seen better days.