DDJ-SX2 not recognized / flashing FX 2 button on deck 4

Hello.

DDJ-SX2. It was plugged in with another C adapter to the Mac. Since then, Audio MIDI Setup has not recognized it anymore. It was turned off when switching the C adapter. I tried other C adapters, cables, the computer (also M1), and a factory reset. The computer doesn't recognize it.

Now it is connected via Orico CT2U3-13AB USB 3.0. The SX2 blinks strangely when I switch off that port (it starts the initial light sequence, but only for a second first LEDs turn on, then repeats). If I leave it on, then after ~8 seconds flashing FX 2 button on deck 4 occurs. The SX2's power supply gives 5.2v.

Any info will be appreciated.

Thank you,
Roger