Pixhawk 2.4.8 issue with I2C

Hi,

I am facing a strange problem.

My Pixhawk when connected via USB gets detected and connects to Mission Planner perfectly.

The issue starts whenever I plug anything into the I2C port (GPS / I2C Extension etc.) the Pixhawk Board fails to get detected by the Windows 7 machine.

The USB says “UNKNOWN DEVICE”

After unplugging the I2C it again automatically get detected!

Please help me with the issue!

Looks like power regulator chips are too weak. check coments here