NEJE Master 2S with Laser Module A40640 Problem

I have NEJE Master 2S with Laser Module A40640 almost 2 years old. It was working fine until yesterday and suddenly Module started with full power and burning the material. I turned off the machine, removed the power for a while and turned back but the same problem. Now, instead of low light at standby mode it always have 100% power.
what could be the issue…driver control board on top of the module or main mother board problem.

Thanks

I had the same problem with my A40640 on the 2S.
It was the board on the laser module, you can get a replacement kit at the Neje store.
Be sure to check the wiki on how to repair it before you dismantle it as I nearly damaged the board underneath.

https://neje99.com/faq/how-to-change-control-board-for-n40630-a40640.html