Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to DC Volts 
Unclip and remove display PCB
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Measure the voltage at each of the
display pins to a suitable earth point.
Are the voltages approximately as per the table?
display pins to a suitable earth point.
Are the voltages approximately as per the table?
Isolate as per TOPs P4
and refit as necessary