Set Appliance State:
Mains Power Off
Set Multimeter to DC Volts 
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Measure for DC volts at the connections as per table below:
Note:
Ensure a good connection is made, or misdiagnosis may occur.
| Black probe (CN203) | Red probe (display connector) | DC voltage (approx.) |
| Pin 3 (pink) | Pin 2 | 1.7 |
| Pin 3 (pink) | Pin 4 | 1.7 |
| Pin 3 (pink) | Pin 6 | 5.0 |
Note:
Ensure a good connection is made, or misdiagnosis may occur.
Isolate as per TOPs P4
and refit as necessary