As a final test I fed the QMX with two external regulated supplies, 3.3v and 5.0v and provided for ADC_3V3 and ADC5V with two potential dividers.
Unfortunately, the QMX reacts in exactly the same way as before when using power via PCB 1 & 2.
Top row of display.... dark boxes?
Nothing happens when connecting the QMX to my laptop...all combinations of powering up and connecting the USB cable.
Maybe the firmware dosent like this arrangement....otherwise I pronounce this QMX dead.
73 Steve G4EDG
