Okay so you actually have the LX, this could actually work. Try getting through the diag mode. When you turn on the car and the diag mode comes up press the hang up, call, and voice control then once you hear the beep speak as loud as you can so the system will recognize the voice. press Done without entering any numbers
Press and hold Power Eject and Home all at the same time for several seconds. You will then see this screen:
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On this screen Press and hold the Power button for several seconds.
You will get a screen asking about inline diag settings. Tap that to set it to complete and then tap return
You should now be at the normal startup sequence.
Power everything down and if done correctly, it will boot up normally with no diag window.