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Hello,
tried to flash a (custom) firmware on a RUTX09 but the device didn't boot properly afterward. It is not possible to connect to device anymore (neither via http nor via ssh). I tried to get into the bootloader menu (according to https://wiki.teltonika-networks.com/view/RUTX09_Device_Recovery_Options) but that also failed (tried many times). The device seems to boot (power LED is on and if I connect a ethernet cable to the PC also the corresponding LAN LED lights up. However after a few seconds - and it doesn't matter whether reset button is pressed or not - all LAN LEDs light up briefly and then go out (and I think the device restarts).
I did the same things with another RUTX09 device we have. Custom firmware and bootloader menu work flawlessly.
I do not remember the firmware version the problematic device had (Batch no. 004) - but it was definitely a different one than the device which works (Batch no. 019) (both were ordered together).
Thank you