Helical antenna problem?

Hi vgo195,
I had exactly the same problem with two of my M2 units, which no longer supply power to antenna. I didn’t succeed to find if it’s a software failure (short circuit protection locked) or an hardware one. Anyway, don’t throw it in the trash can !
I succeeded to repair them with a quite simple fix : connect TP24 pad to antenna inner pin connector pad through a 18 ohms resistor and a diode. TP24 is linked to 5V M2 external power. This way the antenna is directly powered from the external source.
I cannot guarantee it is completely safe for the device but it works anyway. Always connect or disconnect the antenna when the M2 is not powered, it prevents shorts.