My T715 is having a problem. It will be working normal in slide-closed position but as soon as I slide-open the phone the display will become full of dotted-colors (just like the old tv screen without cable-signal) and turns off. Then I will have to turn OFF and ON the phone again and in slide-closed position the display will be normal. But the same problem still exist.
Summary - The phone display works normal in slide-close position but problem in slide-open position.