1. On boot the pic of the fix waits 1 second for the pstwo to initiate. 2. Check to see if the CD Tray is open, it does IMMEDIATE SHUTDOWN on PSTwo. (This is the test mode, which enables to check at anytime if the fix is working ). 3. Checks for INT every 250ms. If at anytime the INT is high, the pic code jumps to watchdog routine. 4. If 1.5 seconds from booting have passed and the INT is still not active then the PIC CODE will mute the RS2400FS and that way will disable any current flow to the lens and to the CD/DVD motors. 5. If 3 seconds from booting have passed the PIC CODE shutdown on the pstwo to save the lens. 6. Clip the input tracking signal from the CD/DVD controller to 1.2 voltage (more stable and safer). 7.New PCB design with Blue light LED (flash) when the PIC working on the PS2 console. For installation, you still can fit the installation by soldering with 3 wires (skill tech) or 5 wires (general tech).