K40 not firing

Machine: K40 with M2 nano board

Board: m2 Nano

Firmware: _Smoothie

Problem/ Question: I had the machine running with the old board and when I switches to the cohesion board and now it won’t fire. Everything moves correctly, I checked the wiring and that was ok but when I run a file with no laser action, can’t test fire from lightburn either. The machine fires from the machines test button so I know it works.

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