Set Appliance State:
On/Off Switch OFF
Set Multimeter to AC Volts 
Isolate Mains Power to appliance as per TOPs P4
Gas On
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Appliance On/Off control set to On position.
Measure the voltage at the second terminal from the right marked LR (live) and the seventh terminal from the right marked N (neutral) at connector ST2 on the PCB.
Measure the voltage at the second terminal from the right marked LR (live) and the seventh terminal from the right marked N (neutral) at connector ST2 on the PCB.
Isolate as per TOPs P4
and refit as necessary