How can I tell if my laser is bad?

[xchrisd]

Hey, maybe you try an older software of snapmakerjs or luban.
look at this post:

Not able to activate the door detection

Hey guys, I just built my own enclosure for my snapmaker and want to add a door switch for laser engraving. So I just wanted to measure which pins of port 4 have to be connected to simulate a closed door, when the door detection mode is turned on. But unfortunately I am not able to switch the detection mode on in snapmakerjs although the printer is connected correctly to the PC and the serial communication is activated. When I try to select the ON state in the settings, it just jumps back to OF…

for more support maybe PM @parachvte