Hoping this "solution' will be applicable to the disappointing performance of our RCA cd player
model # RS2764, which worked for one week !
What I did and you might want to try is I turned it upside down and shuck it. This might work because the cd could've gotten stuck behind the disc tray. Usually if that's the problem you can here it in there. If that doesn't work and its under warranty take it back and they'll give you a new one and Cd's.
New CDs may have some rough spots around the inner and outer edges. If such a CD is used, this unit may reject the CD. To remove these rough spots, rub the edges with a pencil or ball-point pen, etc.
Usually answered in minutes!