The most reliable setting should be overclock, that will work with all games. You might also want to turn on the vertical alignment detection as well set it from auto to 0.
Are you in the relaxed firmware or standard? And what is the output resolution set to?
Do you have any pictures of your flex install? You might have forgotten to install the +5v connection which would cause some tvs not to display.
There are 3 signals needed for the audio to function. The resistor pack is 47ohms as well.
The audio signals route to the HDMI Transmitter, ADAT, ABCK, ALRK
I recommend you watch the update video I did. I go step by step. If it doesn't work, then there has to be a connection issue to the flash. Shorter wires can help.
That is C48 and was removed for one revisions, its not needed as the ESP has onboard caps.
As for audio not working, the audio stream is encoded inside the video. So if you have video, then its not an hdmi connection. It has to be upstream, I would double check the flex connections on the...