I have a 7900 seedling now, and I'm using a multimeter to measure the resistance in the center pin of the M-connector. It doesn't seem to be connected to anything. I also measured the antenna parameters up to 380 MHz with an antenna analyzer. I suspect it's faulty. I can't open it up. I want to find a disassembly video and see if the antenna connector is broken inside the M-connector.
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