Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to AC Volts Set meter to measure AC Volts
Gain access to PCB (use Insulation Mat as required)
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Measurement:

Measure for mains voltage across live (brown lead) and neutral (blue lead) of connector X1.
Expected voltage mains voltage?
Note.
It is possible to measure for mains voltage at the top of connector X1, ensure a good connection is made.