I have a model275 gateway tablet laptop. And when I try to turn on, nothing happens. If it is switch, how do I repair it.

It could be a couple of things. My on switch on my tablet PC needs to be held for ten seconds or so before it powers up. This is a function created to prevent accidental turning off and on. So I would say try holding the switch for a good 10 or so seconds. If that doesn't work try taking out your battery in the back of the laptop then reinserting it. Also make sure the power outlet that your charger is plugged into is working as well. Hope these ideas help you with your problem.