Brother DCP8112DN

6.1 Nothing is displayed on the LCD

Step	Cause	Remedy
1	AC cord failure	Replace the AC cord.
2	Connection failure of the panel harness	Check the connection of the panel harness, and reconnect it if necessary.
3	Connection failure of the backlight harness	Check the connection of the backlight harness, and reconnect it if necessary.
4	Connection failure of the LCD harness	Check the connection of the LCD harness, and reconnect it if necessary.
5	LCD failure	Replace the LCD.
6	LCD flat cable or LCD ASSY failure	Replace the LCD ASSY.
7	Backlight PCB failure	Replace the backlight PCB ASSY.
8	Panel PCB failure	Replace the panel PCB ASSY.
9	Touch panel PCB failure	Replace the touch panel PCB ASSY.
10	Low-voltage power supply PCB failure	Replace the low-voltage power supply PCB ASSY.
11	Main PCB failure	Replace the main PCB ASSY.

6.2 Control panel is inoperable

User Check

- Check that the function lock is not set.

Step	Cause	Remedy
1	Panel unit attachment failure	Reattach the panel unit.
2	Connection failure of the panel PCB harness	Check the connection of the panel PCB harness, and reconnect it if necessary.
3	Connection failure of the touch panel PCB harness	Check the connection of the touch panel PCB harness, and reconnect it if necessary.
4	Connection failure of the touch panel harness	Check the connection of the touch panel harness, and reconnect it if necessary.
5	Rubber key failure	Replace the rubber key printed ASSY.
6	Panel PCB failure	Replace the panel PCB ASSY.
7	Touch panel PCB failure	Replace the touch panel PCB ASSY.
8	Touch panel ASSY failure	Replace the touch panel ASSY.
9	Low-voltage power supply PCB failure	Replace the low-voltage power supply PCB ASSY
10	Main PCB failure	Replace the main PCB ASSY.