Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Disconnect the display harness from X40 on the main PCB and at the display board
Measurement:
Measure for continuity (zero resistance) through each of the 5 wires of the harness, in turn.
Inspect the harness and connectors
for good overall condition.
Inspect the harness and connectors
for good overall condition.
Isolate as per TOPs P4
and refit as necessary