Ok, so I've got the manual. This is what I read:
4.5.2 Entry Point
The entry for Diagnostics is the combination of hard key.
User should press 'xxx' and 'yyy' altogether.
After pressing the hard button for entry, OP displays.......
So what the hell does that mean? There is no 'xxx' or 'yyy' hard keys, or soft keys, or any other kind of keys. I been through every menu I can find. I think they need to hire better Korean to American translators to write these manuals.
Does anybody know how to get into the service mode? =^..^=