I have a Lite-On DVD player (LTD-163). A few days ago it stopped playing any DVD. It plays CD's fine. It spins for about a minute then stops. If I click on the DVD icon it says to insert DVD. I've tried unplugging the power from the unit (maybe it has some sort of memory that needs to reset) and I tried to clean it. Any ideas? The drive is a little more than a year old.