Samsung Blu Ray player won't play DVDs?

So I recently bought a Samsung BD-P1600 Blu Ray Disc player, and for the first week it worked flawlessly. But after a couple weeks I've been having trouble playing almost every standard DVD. Blu Ray Discs work perfectly. Once I insert a normal DVD though it takes about a minute to read (it makes some rather unpleasant mechanical sounds... though they could be perfectly normal), and when it begins to play there is all this digital audio/visual distortion (The screen is broken up into brightly colored squares - clic digital distortion, and the audio is halting). When this issue began cropping up I was able to resolve it by taking out the disc and cleaning it, but at this point even brand-new dvds are effected. What do you guys think? I had originally thought that perhaps the DVD laser was just more sensitive to dust and smudges, but that shouldn't be an issue with new DVDs. I'm thinking it's a hardware issue... Or perhaps a software setting? The player is still under warranty though, so that's always a last resort.