I have a the ipronto tsi6400 soon to be the ipronto frizbee!! this Piece of *(^( has never been right. It refuses to calibrate. when i try to calibrate the unit i get a calibration failed when hitting the crosshairs. before this issue i was getting the freeze ups but the hard reset would fix it. i called phillips to have them tell me the unit is out of warrenty and it would cost me $230. usd to fix??? how did they pull that magic number out of the air?? they havent even seen the unit yet to know whats wrong? Then they refused to answer this simple question. After i take off the 5 torx screws .. how do i open the unit without cracking any plastic clips that may be holding the back and the face together.? i can not find any scematic manuals anywhere? How do i get to the ts screen cable to see if its connected correctly?