Once you have the assembly off of the burner it's time to start disassembling it by removing all the screws you see. There will be many small screws so be patient. Cut any flat cabling off. There could be two diodes, one for the CD portion of the burner (IR diode) and the actual DVD burning diode (red). That is the one you want. There will be a 3-pin circuit board on the red diode that you want to CAREFULLY remove with a soldering iron revealing 3 pins. You can test the diode with 2-AA batteries and referring to the polarity chart (on the video). You will have to remove the diode from the housing and that will be in a case-by-case basis depending on the burner. The laser diode is fragile so take care in the final extraction process.