I bought a Sony Precision Cinema 5 disc CD/DVD player DVD DVP NC6615P some time ago. I have over 400 movie DVDs. Every movie I played was error free. I was paying around $80.00 for cable and decided to cancel cable and buy my favorite sitcom series and watch them all day. The sitcom DVDs were used but so are my movie DVDs. A lot of the sitcom DVDs would stick or not load. I went to Sony's website and typed in my problem. The answer was to turn the player off and hold down the Clear button on the remote and the Power button on the player until the message ALL CLEAR or ALL ERASE is displayed. I held the 2 buttons down for 3 - 5 minutes and neither message appeared. It doesn't stick as much as it did and I've had a couple DVDs that wouldn't load. I've played a couple of the nonfunctioning DVDs on my computer DVD player and they played fine. It's very frustrating when a DVD sticks or won't load so I'm going to get another player and post the 5 disc player on Etsy and/or Amazon explaining the problem and for half of what I paid for it. Maybe someone will know how to "fix" it and will have a 'like new' player for half price. I'm 72 years old and have had to remain calm to keep from smashing it on the floor. Hope this answer helps you Pablo. Good luck and stay calm.