i did a search and could not find what i was looking for
i have a slim ps3 hooked up via hdmi,sound did work
i have in game sound disc only,also i get sound when in psn store
no sound with downloaded games, no sound on my dasdboard or when i put a movie in,no sound on start up ether
i dont think it is my hdmi hook up mybe something internal
That doesn't make a lot of sense. The only thing that it might be is if you have checked an audio format in the Audio Output Format / Sound Settings that the monitor doesn't actually support. Some software such as the Playstation Store only supports 2-channel stereo, so it ignores the audio output format. Software that supports multiple audio output formats will choose the best one out of the ones that are enabled on the PS3. If that mode isn't compatible with your audio output device, then you will get no sound.
I had the same issue, I went ahead and bought ff9 on psn as well as Persona 3 and after I installed I have no audio what so ever coming from my ps3. I tried all the solutions ppl have stated and nothing. I have the 250gb super slim ps3.
i never messed with my settings
i also hooked up my component cables to see if that would work but it did not
oh i forgot to mention the before my sound quit working i was getting a loud static sound every once in awhile