Xseries :: My 6 Screen Is Going Stripy And Blank

this only happened this morning after using my phone, i was browsing Internet, i had made a phone call, i had been on ovi stores and then suddenly the screen starts showing all of these multicoloured lines, flashing, like the display was giving up. it's a bit like when a computer monitor isn't plugged in properly. the touch still works, its just i can't see anything.i tried resetting the phone, which it did, but it seems as though the phone software isn't the problem, its the display on the screen.