Particle P1: USB not recognized

I am using a P1 mounted on a development board with the USB port broken out to a micro USB connector. The P1 is not detected on the device manager. I have previously used a P1 on a similar development board, USB worked! (this was a few days ago). All drivers on my Windows 10 laptop seem to be installed correctly.

What could be the issue?
Thanks in advance!

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