Hi, i just bought a new playon HD2. After installation there is picture but no sound. I tried installing the latest firmware. Still no sound. Tried with another tv and hdmi cable still no sound. BUT i found out that when i plug out the HDMi and replug in again there is sound. But when i off the player and on back again, no sound again. So i have to replug the HDMi to get the sound back. What could be the problem? Any help is much appreciated