A service from the Video Re-fit shop was here yesterday and installed the latest firmware update to fix the audio lag on my LG 55lh55. The software version my tv had was 4.22.00 and it was updated to version 4.30.1. The lip sync problem looks to me to be about 90% better but not perfect, in fact, the audio may be slightly ahead or the video now
With version 4.22.00 I was able to access the service menu by holding down the menu keys on both the tv and remote simultaneously for a few seconds until the password screen popped up and I would enter 0000. If you are not sure what you are doing you are not advised to change anything in the service menu as it could void your warranty and kill your tv. The one setting I wanted to try to tweak was the lip sync setting but decided not too as the service guy was coming over in a couple of hours.
With the new s/w version 4.30.1, I am no longer able to access the service menu with the above technique. I called The Re-Fit Shop and asked if the could tell me how to get in. The guy said they were not allowed to give me that information and that if could void my warranty. I explained I just wanted to try and tweak the lip sync setting and nothing else and the tech guy finally said the have a special remote from LG to get into the service menu so I would not be able to get in. I don't know if thats true or if he was just trying to get rid of me.
Finally, after my long rant, does anybody know if it's possible to access the service menu manually with the 4.30.1 software ? Any help would be greatly appreciated! Thanks.