I have this problem at the moment and also a few years ago. I haven't found a solution YET, but you may want to mess around with it a bit before taking extreme measures and getting a new one. If its in really bad shape, then you may need repairs though. :(
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=== Update (01/31/2018) ===
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Remember when I said I was fixing one? Well, if you are extremely careful, take the left shoulder button off and gently push the orange plastic things in a bit. The bottom screen will work if you try poking around this area carefully. As for the top screen, I didn't find a solution. DO NOT PULL THE PLASTIC THINGS OUT.
I have this problem at the moment and also a few years ago. I haven't found a solution YET, but you may want to mess around with it a bit before taking extreme measures and getting a new one. If its in really bad shape, then you may need repairs though. :(