40w laser running at half power when set to 100% in light burn

[berainlb (PY)]

Is this on a Monport laser? If so, there have been a number of boards shipped with essentially a design flaw that prevents full power access.

There have been a number of reports on the forum with the same symptoms.

Here’s the first that I saw and confirming the diagnosis:

Monport K40 Pro+

Hoping to get some help. Just received my Monport K40 Pro yesterday. Got it connected to Lightburn. Turned the knob to max on the machine so that when I test fire it reads 19mA as my max. In Lightburn, my machines $30 is 1000 and my S-Value max is 1000 but I don’t get 19mA when my file calls for 100% power. I can change the S-value max to 9000 to get 8mA but I can’t get any higher. PWM signal from the board at varied values (S-Value max is 1000) at 20% I get 1.348vDC (4mA) at 40% I get 1.708v…