This iPad mini backlight repair service is for all generations.
Most of the time no backlight is due to burned filter or/and diode. Often these components get burned when unplugging the LCD from the logic board when lit.
Sometimes the filter is badly burned, destroying the pad on the logic board. This leaves no room to solder new filter and forces to create a small jumper. After such repair, installing LCD needs to be take with great care since this time the connector it self can be damaged.
Mail in your iPad mini for fast repair. If you are a shop, ship just the bottom case without the lcd and screen. No need to remove the logic board from the device.
Typical repair within 24-48 hrs