Daughter turned on her hudl 1 and it looked like this and now it won't turn off , is it fixable ?

, color problems usually indicate that the power supply, inverter board and the backlights are working fine and the real cause is either in the main board, loose cable (wire or flex cable),or a controller board (LCD panel) problem. The color and brightness of yours looks fine, the desktop is visual when rotated and the lines remain in the same area. The way I would go about it is to first check the cable (doubtful but hoping) if that does not accomplish anything, replace the LCD. check here and on here for some decent videos for the task. Here isthe teardown, not a guide, but it will give you a pretty good idea of what needs to be done. The display is a bit hard to find but there are places like this that have those. Also check for GT-N8000 when you search for the display. Hope this helps, good luck