SamyGO

Yes, I know the Samsung reset will not restore all the setting to default if you mess up. In fact, you can find many people on youtube posted about how they fixed distorted image by changing the service menu setting. So you can always reverse the procedure to make the TV bad if you know how to fix it.

Looks like you don't know what the service mode is.

I know this is a stupid question, but I do need to do this for a bad reason as I don't want my son plays games with friends whole day during weekends I have a 60'' D serial and know how to get into the engineering mode. "mute" 1,8,2. So my question is about how I can change the setting to ...