Hi. Im new here & I need your help. I recently bought a 2nd hand 7 inch tablet Livall n751 android 4.0. I encountered a problem today while playing a movie. The unit suddenly froze & when I turn it on, its just a black screen. I was able to enter recovery & chose the option restart but it still a black screen. I've been searching about this model online so I could at least find a solution but I think that it is an unknown brand since I cant really find anything helpful at google. Pls help me guys. What will I do? Can I install custom roms or something? Upgrade to 4.1? Im not quite familiar with android but Im really a fast learner.