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  1. S

    A2289 820-01987 after the startup sound it turns off

    And how to check the external / internal video?
  2. S

    A2289 820-01987 after the startup sound it turns off

    I am Russian, and I don't quite understand what board boots means, and I didn't quite understand this sentence "How do you plan to diagnose a machine with no video problem???" I am translating the text through a translator, can you please explain more precisely?
  3. S

    A2289 820-01987 after the startup sound it turns off

    Where to dig further?
  4. S

    A2289 820-01987 after the startup sound it turns off

    L7670 - 5v L7690 - 3.3v L7220 - 0.6v L7210 - 0.6v There is no way to connect external video, do you mean the usb-c ammeter at the usb account?
  5. S

    A2289 820-01987 after the startup sound it turns off

    Sorry, won't happen again. Nothing appears on the display
  6. S

    A2289 820-01987 after the startup sound it turns off

    12.5v stable
  7. S

    A2289 820-01987 after the startup sound it turns off

    Hello, I'm new here, but I recently started to deal with the repair of MacBooks. The problem is this, the MacBook does not turn on the first time, you need to press several times, the fan will scroll for a second, the power-on sound appears and that's it. Where to dig? What can be connected...
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