I am such a happy guy right now. For the last few months my LTR-40125 has been giving me constant red/orange flashing leds when I was burning… meaning that as I was trying to burn a disc the buffer underrun protection had to come on over and over as the drive wasn’t getting data fast enough… I tried the normal checks… cable, dma, media, etc. and still had probs. Recently I bought a new harddrive & controller… That was it! The controller I had was malfunctioning. Once I put the new controller in everything was fine.