Directly below the lens is an LD (laser diode), which generally has three pins. Below the LD is a small circuit board, which is directly welded to the three pins of the LD. Two red and black wires are welded under the circuit board for external power supply.

If you want to replace the LD, you need to weld the original LD from the circuit board and put it back with a new locating pin.

The lower shell of your laser module can also be divided into two pieces, which can be glued with dry glue and beaten with a rubber hammer. After the LD is loosened, it can be replaced. Finally stick it back.

I hope it works for you.