Set Display Resolution on OPENTEL 4K-OP10C (TV supports 4K)

  1. Press (MENU) on remote control
  2. Press "Down" arrow to (System Setting) and press OK on remote control 
  3. Press "Down" arrow to (Accessibility) and press OK on remote control 
  4. Press "Down" arrow to (Display resolution) and press OK on remote control
  5. Select (Display resolution) : 4K 50Hz
  6. When finished, press "Right" arrow to (Save) and press OK on remote control
  7. On screen will show “4K หากคุณเปลี่ยนความละเอียดของจอ 4K ในทีวีที่รองรับได้เพียง 1080i อาจจะทำให้ทีวีแสดงผลเป็นจอดำ” , choose (Yes) and press OK
  8. If screen is black, do not press any button, it’ll return to previous Display resolution setting, choose 4K 25Hz or lower until the TV program shown on screen.
    And if screen is black and set top box is inactive more than 1 minute, press and hold Power button on box more than 5 seconds, a green led will be flashing then release a button after stop flashing to reset factory setting
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