This probably wont be much help, but have you tried locating the firmware from the LG site for that player and reinstall it?
Failing that, if it stopped reading cd's recently, maybe a system restore might help.
Wait for better replies first :-/
Best phone camera 2017
Stunning new film posters by Hattie Stewart, Joe Cruz & more
iPad Pro 10.5in (2017) review
28 astuces pour profiter au mieux de votre iPhone