This kit comes with the basics you need to repair a short in your power supply wire (the red wire that connects to the laser tube.)
It includes:
-4 alcohol wipes
-2 heat shrink tubes
-1 tube of liquid electrical tape.
After finding a short in your red wire, use the alcohol wipes to clean up the burned up area. Fill any holes or cracks in the insulation with the liquid electrical tape, let dry, and then cover with one of the heat shrink tubes and use a heat gun or hair dryer to shrink the tube so it fits tightly around the wire. (2nd heat shrink tube is extra if you have multiple shorts or mess up the first one.)