"No Disk" message on front display

If when you insert the disk you hear a whirring and clicking noise, CD spins, and does not read, then that is a problem with the DVD lens.

The DVD lens try to focus on the DVD track, by moving lens pickup and spinning the disk, but cannot read the tracks because the lens is dirty or defective.

Try first cleaning the lens with a DVD cleaner disk. And also if you can see the lens from the outside try blowing some canned air on it.

If this still does not help, then the lens pickup may be faulty, in this case you often replace the whole DVD drive unit inside the DVD player.