I suggest first checking the device settings in LightBurn and making sure the Min Frequency and Max Frequency match your laser’s datasheet.
You can also try switching the Source setting from JPT back to IPG. If your JPT laser is not an M7 or M8 series, it is usually more appropriate to select IPG.
Based on your parameters, your machine appears to be a Q-switched laser rather than a MOPA system, which means the pulse width is typically fixed around 100–200 ns instead of being adjustable.
It’s worth testing by setting the Source to IPG first.
Regarding Analog vs Digital control: IPG-style machines generally use a standard 0–10V analog signal for power control and are often plug-and-play. In contrast, JPT M7/M8 MOPA lasers use a digital communication protocol that transmits detailed parameters such as power, frequency, and pulse width.
If your laser is not a true MOPA system but is set to JPT mode, LightBurn may be sending the wrong type of control signal, which can result in weaker output, inconsistent performance, or the need to increase power settings to achieve the same effect as before.