Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Gain access to PCB (use Insulation Mat as required)
Disconnect A2 from the PCB
Disconnect the blue wire from the APS
Disconnect A2 from the PCB
Disconnect the blue wire from the APS
Measurement:
Measure resistance between the blue wire of the APS and connection 9 (furthest right) on A2.
Short circuit expected.
Short circuit expected.
Isolate as per TOPs P4
and refit as necessary