Tevion MD 82601

  1. enter setup by pressing "AV" button
  2. type 8, 5, 2, 0 (now, there should be some more menu items)
  3. use up and down keys to select DVD or BD region
  4. use the number keys change region (use DVD region 0 allow all regions)
  5. press "AV" to exit the menu
  6. turn the device off