I just got a ltd 166s and it makes a hissing noise whenever I open the tray, and the noise remains there for a few secs. It also makes that noise when it tries to read a cd before it spins up. Also, there seems to be something sliding around on the inside. Did I get a bad drive?
everything's fine, look here.
Gotta love these steam powered drives .. a godsend in a powercut
Joking aside, check out AZImmortal's post, that will explain a bit to you