353S02471 Backlight IC for iPad Pro 12.9 (5th Gen, 2021)

The 2021 iPad Pro 12.9 introduced a mini-LED display, and a dark or dim screen on one can mean the backlight driver has failed. The 353S02471 is a 64-pin backlight IC listed for the A2379, A2461 and A2462.

The listing doesn't give a board position. It mentions the part is in limited supply.

Backlight faults

• No backlight with a faint image visible.

• Uneven brightness.

• Dim screen at full brightness.

• Backlight lost after liquid damage.

Diagnosis

Shine a torch at the screen; a faint image means the panel is working but the backlight isn't. Test with a known-good display if you can, and check the display connectors.

Disconnect the battery, find the chip in board view and preheat the board. Lift and replace the chip on fresh flux. Test brightness at full and low settings before closing, and check for uneven zones. View a plain white and a plain black image in a dark room, since mini-LED backlight faults often show as patches rather than a fully dark screen. Fit fresh adhesive when you refit the display so it seals evenly.