Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to Resistance Set meter to measure resistance
Disconnect plug marked CN2 from PCB

Measurement:

Measure the resistance across brown (live) and neutral (blue) of disconnected connector CN2.
LeadsResistance in Ohms
Brown - Blue160 ohms

Ensure a good connection is made.