I bought a 730 today unfortunately a problem occured immediately. When I just got home, I turned on the phone and then the display went out. I double tap it, no response. I pressed and released the power button, again no response. Lastly I long pressed the power button, then a display says "to turn off device slide screen down" then without doing nothing the display went out. I already done a hard reset, it went through all of the process but once the icons were loading again the display went out. Is this a software problem? I have no card inserted yet.