Im buying one next week just want to make sure about the problems right off the bat since the store here let's me check everything before i buy it. I heard about 3 constant problems. 1. Dead pixels? How do i search for these? and what does it look like? haha sorry im a noob 2. loose hinges? like how loose should it be to be defective? 3. something about the circle pad? can anyone clarify? thanks!