1, Unscrew the back plate
2. Unscrew the box on the left hand side and take it off.
3. Disconnect the wirings by press and pull off the connectors. All 4 of the connectors are
different from each other, so you will not make mistake on putting them back.
1st connector
2nd connector
3rd connector
4th connector
4. Disconnect the wirings of the main control board and power board (If it is difficult to
pull off by hand, please use tools, like pliers)
1st connector
2nd & 3rd connector (please remember the position of each wire, they are crossing each
other to the connector)
4th connector (please remember the position of each wire, they are crossing each other
to the connector)
5. Unscrew the power board and take it off.
6. Replace with a new main control board and fix it with screws.
7. Connect the wires according to the previous steps. Fix the box and screw it.
8. Assemble the plate back on.
9. Finish.