White Screen? L Button?

Ok, my DS is not working very well. My top screen usually freezes white and I have to press L and flip my DS for that to go to normal. My L button is also not working. I thought and I think my DS kept falling. Is there any way to help my DS? Or should I just get another DS or DSI?

when you have to flip your ds, it usually means it's screwed
hope you have 300 bucks because ur gonna need a new one.