Won't read DVDs
Hi, Ive just repaired several liteon's ( incidently they are identical inside to some philips models ). In most cases the non writing or non reading problem is caused by dust on the laser glass. You have to open the unit then remove the dvd drive then remove its covers and just give a wipe of the laser with a clean non fluffy cloth. If theres lots of dust in other parts of the drive then this will need to be removed also as it could easily get onto the laser when in use. Even almost new liteons can suffer the problem , it only needs a little bit of dust to top the laser shining onto the dvd , instead the dust just reflects the light back. Hope this helps.