I've had progress with the issue of soundbar making a random short hiss/whitenoise when in standby as Philips sent an engineer and replaced the powerboard. Of course there's no evidence the issue is caused by that board as opposed to being a firmware issue but at least they're trying.Here is a sound capture I made of the random morning noise
Ironically, it hasn't happened as much in the past month, but lets see if this fixes it completely?
BTW, the internals are very neat, just three boards laid next to each other. 1. Power 2. Panel driver 3. System board. Whole operation only took about 20mins. He didn't have any spare screws left after rebuilding, unlike when I dismantle something