Putting on my moderators hat for a moment, I'd like to inform the forum that we NEVER assume that a poster has somehow caused damage to their equipment without telling us.
If a member can be bothered to ask for advice, we give that advice without making assumptions as to how the damage or problem might have arisen. In this case, the OP claims that the issue arose without forewarning, so that is how the problem will be treated.
I have no idea why a perfectly functioning machine will suddenly decide to stop working properly, but they do, and that is what we are here for, to offer constructive advice as to how the iPad can be restored to use without costing hundreds of dollars to repair.
It is clear that the OP thinks that his problem is being taken lightly. It is not.