LG DK7942P ALSO APPLIES TO LG DK 8621P (DVD/VCR UNIT)
The procedure is same as others, Turn on the unit, with remote, (no disc in player), press pause, then key 3 1 4 1 5 9
Instructions for changing region code appear on screen,
Set to Region or Disc you want to play, 1, 2, 3, 4, 5, 6, or 0 for all. Press pause again. Turn off machine.