If you connect Alfabox UX3 and the screen is “jumping” or there is a black screen and you see one of the messages on the screen:

  • no signal
  • mode not supported
  • missed matched output

That means the resolution is not supported.

The resolution has to be changed from BIOS (Basic Input/Output System).

Follow the steps below to change the resolution:

  1. Connect Alfabox UX3 to your TV via composite cable (red, white, yellow) or HDMI cable
  2. Unplug the box from the power
  3. Press and hold MENU button on the remote and plug in the box holding the MENU button until the black screen with a blue line appears
  4. Select TV System and press OK
  5. In the TV System make the following changes:
    For composite cable: NTSC 480i
    For HDMI cable: 720p-60 or 1080p-60
  6. Select the proper resolution and click OK
  7. Choose Exit and Reboot and press OK twice.

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