I decided to return to my long suffering ps vita, only to fine a blank screen. I can see a back light on the oled screen, but it won't go ito safe mode no matter what I try. I decided to tack the plunge and by a new screen, thinking it was that. No joy! the vita still doesn't work I can hear it responding to a 'off' when I keep my finger on power off the touch the screen in the right place... I happen to have 2 vita, is it possible to re install the firmware, even with the screen dead, via some other process or reset the nand ?