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I have a Samsung Galaxy tab s 10.5 SM-T807R4 with Half screen half side of the screen works well and the other side white with multi line the touch screen function works well in both sides this looks like this link for another tablet http://www.slatedroid.com/topic/37131-dr… i think i need to replace the LCD. the screen has no cracks looks good is there a video or some guide i can follow to do the repair ? please help me out thanks

It can be also a flex cable or flex cable connector problem. So check them before buy replacment display. Some times flex just slides a litle bit out from connector causes problem like this. If a tablet was droped or bended than lcd control board and lcd connection flex can be damaged or lcd glass edge cracks causing the problem. This you can not see from outside or just removing back. Anyway in this case you need new display assembly which comes glued with midle frame and home button, so just move board and other staf from old to new and that it. Do not buy just display without frame from china guys because the price is almost the same and you will need to glue it with frame in correct position. One mistake can damage new display.

matrix, looking at your attached image you are right. you will need a new LCD.