Nav-X error - Cant get readings

[brunoUC]

Hello!

Last year we successfully used our Nav-X MXP during competition. But after upgrading the Firmware to the newer version(3.0.314) we were unable to read any sensor values.
After booting all lights turn on for 1s, then only the 3.3v led turns on with the CAL led slowly flashing. This happens with the sensor connected directly to the roborio and trough usb to a pc.
Im also unable to get any readings from the NavXUI. When connected to the roborio i get the following error message on the Test window vi:

FRIC_navX_Internal_SPI_ProcessingLoop.vi:620001<ER R>
CRC mismatch 1 =/= 255.


<b>Complete call chain:</b>
FRIC_navX_Internal_SPI_ProcessingLoop.vi:620001
Periodic Tasks.vi
Robot Main.vi


I have attached a print from the test window. We have already tried to reflash the new Firmware and go back to the older firmware, but the error remains the same.
Any input on this would be greatly appreciated!