If you connect Alfabox 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 to your TV via composite cable (red, white, yellow)
  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 blue screen appears
  4. In the TV System make following changes:
    For composite cable: NTSC 480i
    For HDMI cable: 720i-60 or 1080i-60
    bios1
  5. Press an arrow down and go to Exit & Save
    bios2
  6. Press the right arrow and select OK on the remote.
    bios3
  7. The Alfabox will reboot.
    bios4
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  1. Pingback: Alfabox media player instruction manual – PolishTV Company Knowledge Base

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