If you connect your iPad Air 1 / 2 / Mini 1 with the USB cable to your wall charger or PC/Mac, you may hear the vibrator turn on and sound and then you have changed the LCD/Glass assembly to make sure it is not your LCD or back-light film and, yet, you still have no screen or dim screen then you most likely have a backlight problem.
New iPad Air 1 / 2 / Mini 1 Backlight Diode for Motherboard Repair.
Repair your backlight issue in your iPad Air 1 / iPad Air 2 / Mini 1.
Ideal to replace missing, burnt, failed Backlight Diode on iPad.
Product compatible iPad Air 1 / iPad Air 2 / Mini 1.