Cheetos wrote

First of all the black screen can be taken off you just have to squint your eyes and try to find the brightness option and just move it all the way to the left and then back over to the right and it will go back to normal.

BUT the gamma however CAN ONLY BE CHANGED IF YOU MODIFY THE GAMMA CODING BACK TO 1 OR 2 DEPENDING on your tv settings.

Either way if you press the guide button it changes the screen back to normal until you get rid of the guide button.

Try not to leech as much.