I am hesitant to post my e-mail up on the forum, and can't send any PM's until I hit 15 posts. Despite having registered in 2007, this is only my second post.
I have the same issue listed previously, audio dropouts on some HDMI connected devices (like the PS4).
I was able to download the firmware from the dropbox link a couple of pages back, but I do not know if it is compatible with my TV. I have the 747i-B11, and I am not sure it is the same as the 747i. The firmware says to check the FM #, but I have no clue what that is.
Also, I see no instructions for the upgrade process and the manual online says to check Olevia's webpage.
So, if anyone can tell me if there is a difference in the TV models (or a difference in the firmware) please reply. If you have a B11 specific version of the firmware, I would love to get a copy (with update instructions).
Or, if you know how to fix the audio dropout problem please reply.
I would also be interested in the process for restoring the TV to factory defaults.