Pixhawk 6C clicking when connected to power

Hardware Pixhawk family
1

My Pixhawk 6C doesn’t turn on when connected via usb or power module. No lights flash. I checked with a multimeter and confirmed that 5v are running to the power cable, which is sufficient power. There is a faint ticking sound coming from the pixhawk when I plug it into power.

2

So this happens

  1. When only usb is connected and power module/battery is disconnected?

  2. When only usb is disconnected and power module/battery is connected?

  3. When usb and power module/battery are connected?

  4. What else is connected to the FC?

Please answer all questions.
It seems to be a overload or HW defect of the FC.

3

This happens in all three of those scenarios.

This happens when GPS is connected to the controller and when it isn’t.

4

Is the GPS he only thing which is connected to the FC?
No other sensors, actors, devices?

If the FC behave so only with a single USB connection, with no other connection; and if the USB power source is good enough I think it is a HW failure of your FC