LimeSDR-USB no power

My LimeSDR has stopped working and has no LED activity when power is applied.
The unit has only been connected to a USB3 computer interface and the external power input has never been used. I have searched DISCOURSE for troubleshooting advice and found No power for a new LimeSDR
I tested the voltage on the FR38 component and measured 5.29 VDC on the side closest to the external USB connector and 0 VDC on the other side. Any help would be appreciated.

@Zack anything to suggest?

Are there any other test points to measure that would help isolate the problem?

Hi @bljohnson44,

  1. Test FR38 for continuity.
  2. Check if there is continuity from the FR38 (side you measure 0V) to the ground.

With the unit disconnected. (1) FR38 measures 1.25M ohm. (2) The 0VDC side of FR38 to ground measures 0.2 ohms.