I've been having a strange issue lately where I will play a dvd and the sound and image will drop out every few seconds. Sometimes it will fix itself, others I have to unplug the HDMI cable and plug it back in and it will work fine. Because of this quick-fix, I swapped the HDMI cable with the one in my cable box, but the issue persists, cable box works fine with either cable. The strange part is I have never noticed the player do this when playing a blu-ray, only dvds. Any idea what could be causing this?