Mini Gerbil debugging – no communication with PC software

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Symptom DetailLikely causes and their solutions (in recommended sequence)
Power LED shines, but inconsistent or no connection to PC softwareWrong software – Mini Gerbil works with Lightburn, and some other software is possible (but unsupported).  Mini Gerbil is not compatible with K40 Whisperer

Incorrect Device selected in Lightburn – select ‘Gerbil STM’

The USB cable is power only, it needs to be a USB data cable.  Replace.

Faulty USB cable.  Replace.

Faulty K40 grounding.  See https://awesome.tech/k40-laser-grounding-instructions/

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