i read a few service manuels from brands such as harman kardon or denon. They all write in the service manual when replacing the bd mechanism you have to write the OPU DATA into the main CBA board of the unit. For this part you need a special software. Is this also recommended when i only replace the laser from the bd mechanism. Because i have already replace the laser on a harman kardon bdt 20 bluray player without writing the OPU DATA to the unit.