オリジナル投稿者： Minho ,
Did you change the screen and IC yourself or was this done in a shop? If it was done in a shop, then you should go back and show them the problem and ask them to take a look at it. It should be covered under their warranty. If you did this repair yourself, then take a close look at the work you did. When replacing IC's, sometimes adjacent parts can get partially or fully dislodged or bridged. Also, sometimes the IC will not seat properly and the soldered connections will be incomplete.