Hello all. Today I finished assembling the QMX and DC on. 11.2V and max 130mA. Pressed the left rotary control and saw a consumption of approx. 117 mA. USB connected and recognised by the PC. Unpacked the firmware file and copied it to the QMX. 40m shown on the display. Unplugged everything. Then I only applied DC and tried to switch it on. Since then nothing works. Pressing the left control knob no longer does anything. Does anyone have an idea what this could be? Have I done something wrong with the firmware?