I have an Lite-On DVDRW SHW-1635S. I just updated the firmware to version YSOZ(?) and I have tried removing the device, re-installing it. I even switched it from the master to the slave bay.
The tray opens and takes in a disk. If I put in A DVD-R or a plain CD it seems to lock up my system; the read light comes on, the disk spins and it keeps doing this until I force my system to shutdown or pull the power from the drive. A blank CD-R fares a bit better, it acts like it recognizes the disk; green light, spinning, stops green light flashes a few times; but all of my burning program says there is no disk in the drive.
It sounds like the drive may be making a bit of extr noise as well, but it is very soft.