I have a 46PFL8606/02 before i had the 8605 model because of some defects it was changed from philips.

Sadly the soundproblems by playing PS3 are the same.

The PS3 is connected via HDMI 1.4a to the HDMI1 in on the TV, the TV is connected via optical Audio with a HTS 3270.
During playing a game (not in the Main Menu of the game) the sound goes off for 1 - 3 seconds very often, sometimes
2 - 3 times in 1 minute, somtimes it works up to 15min without problems.

Give it a solution for this problem?

homey