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Procedimiento de apertura de la Brother MFC-J4420DW

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    I recently encountered the problem, that my Brother printer would not start or react at all when pressing the power button. Disconnecting the power cord, waiting for some seconds and reconnecting resulted in the startup of the printer, but it would immediately shut down with the message that all "All functions will be disabled". In the comments of a Youtube video I found a workaround (https://www.youtube.com/watch?v=Gi7cl588J8Q) namely to remove the paper tray before reconnecting the power cord and reinserting it not until the printer asks for it. That workaround did work for, but that was not a permanent nor a convenient solution.
    Since the warranty of the printer was not expired, Brother sent me a technician who replaced a capacitor. After two or three restarts of the printer, on which the printer still misbehaved, the printer started working normally again.
    As with all guides, you do that at your own risk. You should know how to solder and be at experienced in disassembling and reassembling things.
    Instructions on how to remove the lid on this printer in order to be able to open the device and repair it.

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      crwdns2936071:01crwdne2936071:0 — Quitar el soporte de la campana

      Desconecte el cable de alimentación de la impresora.

      crwdns2936071:02crwdne2936071:0 — Quitar los cables conectados a la parte superior de la impresora

      A continuación, retire la cubierta del lado izquierdo de la impresora (primero levante el lado derecho de la cubierta).

      crwdns2936071:03crwdne2936071:0 — Retire la parte superior de la impresora

      Voltee la pieza de plástico que se muestra en la imagen uno hacia la parte superior de la impresora.

      crwdns2936071:04crwdne2936071:0 — Retire la cubierta

      Retire los tornillos que conectan la cubierta de plástico negro a la impresora (ver imagen)

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