Generally, servo faults are not very common. Perhaps its intensity/gain is too low and it is unable to see the disc. Other than that, laser pickups can still be faulty even if a glow can be seen from it. Check (with the power off), to make sure the spindle motor isnt jammed/sticky. If the laser diode comes on after the pickup has reset to the inner side, whilst the laser lens is ramping up and down, this is normal.
Click to expand.Manually (with power off), guide the sled gear so that the laser pickup is at the outter edge of the disc.
