My QMX+ died the same way on first start-up smoke test. Perhaps what I have found below may help. You might also want to kill the PA voltage by lifting a wire on L502. ?I did find the known, early manufacturing solder fault on the 5V board. My PA is now crowbarred with IC204 CLK2 into IC501 is 100% @ 3.3V on pin 4. Not sure yet if IC204 or the main mCPU are faulted, more investigation in a couple days. For now, I have the 12v bias on TX turned off in the advanced settings and enjoying the RX.
