Friends: My LG GSA-4163B burner is just not reading anything. I took it apart, cleaned the lens and it worked for one day. Then it keeps telling me to insert a disk. The LED in front flashes, but I do not hear the whirring sound of the disk spinning in the tray. The firmware is updated. Is there anything I can do or any diagnostics I can run before tossing it out? Thanks for any help.