オリジナル投稿者： malcolm watson ,
Found this by trial and error with iPad 2 backlight not working.....I have often had a very faint image on the LCD screen after switching motherboards. EUREKA moment !! Take the board off the battery contacts momentarily and usually the screen lights up in wonderful technicolor on the new contact. It's only my humble guess but maybe it discharges some static or makes a better contact second time around but it sure beats having to repair the board.