Yes, I warranty all items for a year. From your responses it sounds like 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
- 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:
Edit: video shows that PCB on the laser is trimmed with the xacto knife to fit into the spacer. Most of the units now have a spacer with the cutout that accommodates uneven the PCB so the trimming is no longer needed.