Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to DC Volts Set meter to measure DC Volts
Gain access to the display PCB
Release the 2 clips on the facia and lower the panel
Ensure NO demand
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Measurement:

Measure for DC voltage between pin 5 (white) and
pin 7 (red) on connector X2 on the display PCB.
Expected voltage approximately 5V DC with no demand.