Identify the display issue.
Light leakage: In a dark room with a black screen, the backlight shows a white halo around the edge, in a certain corner or area, more than the rest of the display.
Vertical/horizontal lines: Vertical or horizontal lines or bands that display incorrect colors or images.
Video noise/flickering Issue: Garbled graphics, pixelation, missing sections of the display, complete image flickering (not backlight only).
Blank screen: The iPad is responsive and detected by iTunes when connected, but the built-in display remains blank or solid colored.
Display/other functional issue: Includes color uniformity, bad contrast, or pixel anomalies.