I have the problem that my FC freezes after boot and just shows solid RED LED.
It´s not possible to connect with GCS (USB and telemetry radio). Same problem when powering FC via USB.
I updated yesterday to Arducopter 4.0.7 and everything worked great - did also some test flight.
Today I did some tests with fport and telemetry script and also that worked. My only problem was that telemetry was not working when I put my frsky archer m+ output to "FBUS (F.PORT 2.0), but FPORT worked.
Suddenly the FC was not booting anymore. I checked SDCARD and downgraded back to 4.0.6, but still the same problem.
I can´t find any information about that problem and I also don´t understand the beep codes.
Here is a short video showing the boot sequenze.
Any idea whats wrong?