Problems with Pixhawk

Blue Robotics Products
1

Hi Guys,
I have an Adwanced ROV Electronics package. I have now installed it and successfully tested it several times. Suddenly yesterday I could no longer establish a connection between ROV and ArduSub. I managed totrace the problem back to the Pixhawk. If I unplug the USB cable between Raspery and Pixhawk, I get a video signal. Unfortunately I cannot connect the pixhawk directly via USB to the laptop. It says owerpower on usb port. If I operate it with an external power supply via the SBus pin, the LEDs light up properly, but no USB connection can be established.
Can you help me?

Thanks

2

Watching this thread as we also have issue with Pixhawk. We powered on the Bluerov2 and only heard the beep sound once (there should be 2 beep sequences, first one for Raspberry pi boot and the second for Pixhawk boot). We have vision on QGroundControl but can’t connect to vehicle.