Seems like your geometry needs adjustment. If you are brave enough, you can attempt at correcting this yourself via the service menu (searching for "sony service menu" should enable you to find out how to do this). If you do decide to try, ensure you write down all your original values (even ones you aren't changing) before altering anything; this way you'll have a way out should something go amiss. The alternative

is to call out an "engineer".
Good luck!