If it's under warrenty it won't be a problem, but it's a old model so I'm guessing it isn't.
I have the KVT-725DVD and mine does that too and it's brand new. It seems ok with DVDs, but hates playign CDs. I've got a changer hooked up now. Another friend had a 725 with mecha error's and read error's. we returned it under warrenty and they installed a new laser and it's been fine ever since. I would return mine, but I can't do without it for another week.
