Yes, I warranty all items for a year. As of today, none of them are out of the warranty.
I have a feeling that as somebody with solder sucker and solder wick, you will have no difficulty with this particular fix.
Here are the process:
- open your unit and remove the PCB. It's all once piece.
- pull off a plastic spacer holding laser and photo-transistor in the direction of the laser
- don't remove the leads from PCB, instead heat up the ends attached to laser one at a time leaning the laser away until completely separated
- shave off if any of the PCB is sticking out on the replacement laser
- put the new laser into the spacer and slide it back onto PCB
- solder the leads to the laser
- adjust the focus if needed by turning the lens
The laser is 6mm 650nm 5V 5mW. There are many listings on eBay and it is worth to get few spares because they're so cheap. The only thing to look for is the leads poliarity. Here's a closeup of the correct type: