I unpacked it, I started to configure it over the wired interface and reset it.
After that it was unresponsive on the wired interface and the radios stayed off.
I tried a factory reset (5 seconds holding down the reset button). The power light started blinking, but it was still unresponsive.
I did a 30/30/30 reset and I got the emergency firmware upload page.
I gave it the latest firmware (2.06B01). It told me "Invalid image file.seconds".
Right now it's completely useless.