hi all my problem is that my drive wont read any disks

i have replace the drive with one to believe to be in working order

everything was working fine tell it starting to make noises like the last one like its trying to read one part of the disk

i'v tried with muitlable disks and even flashing the drive to L.T. 3.0

does anyone know how to adjust the lens on theses drives ???

oh my drive is a benq vad 6038

please help me and sorry for any spelling mistakes and confidences