Philips PET721

  1. Power on with no disc inside
  2. Press SETUP
  3. Navigate to "Preferences"
  4. Press NEXT, PREV, NEXT, PREV, NEXT, NEXT, PREV
  5. Use the UP/DOWN keys to select region (0 for multi-region)
  6. Press OK

Misc

  • Source: official Philips service manual PET721C/D/S v1.2