Lenovo E480 no sign of life

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  • ktmmotocross
    Boardkiller
    • Feb 2014
    • 3567
    • slovakia

    #1

    Lenovo E480 no sign of life

    Hello have this Lenovo E480 that after storm wont work
    NM-B421

    two chargers USB-C dont give me voltage. so i cut one and with cable connect my source and see 2.7W steady. Found hot area near power connector with burning resistor. it is so tiny that i cannot see its value

    when connect charger on one side of this resistor is 20V on other side is pulling down to ground by Q4202

    If anybody have schematic, share on schematics page
    Attached Files
    Last edited by ktmmotocross; 07-03-2020, 09:54 AM.
  • Duranitron
    Badcaps Veteran
    • Jul 2014
    • 544
    • Philippines

    #2
    Re: Lenovo E480 no sign of life

    no free schematics available..all are paid.. anyone care enough to share their schematics..?
    Last edited by SMDFlea; 07-04-2020, 05:01 AM.
    Never stop LEARNING because life never stops TEACHING!

    Comment

    • ktmmotocross
      Boardkiller
      • Feb 2014
      • 3567
      • slovakia

      #3
      Re: Lenovo E480 no sign of life

      we have some good guys like SMDflea that share this schematic

      https://www.badcaps.net/forum/showthread.php?t=85795
      Last edited by SMDFlea; 07-04-2020, 06:54 AM.

      Comment

      • ktmmotocross
        Boardkiller
        • Feb 2014
        • 3567
        • slovakia

        #4
        Re: Lenovo E480 no sign of life

        in schematic i dont see any ID pin but in cable there is wire for it.

        Anybody know how this USB-C charger work? i have new charger, why it dont give voltage?

        Comment

        • SMDFlea
          Super Moderator
          • Jan 2018
          • 20481
          • UK

          #5
          Re: Lenovo E480 no sign of life

          Google search "NM-B421 VSYSTEM2" ,you`ll find some posts on chinafix and elvikom. USB-C is still a mystery to me.
          All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

          Comment

          • Duranitron
            Badcaps Veteran
            • Jul 2014
            • 544
            • Philippines

            #6
            Re: Lenovo E480 no sign of life

            Originally posted by ktmmotocross
            we have some good guys like SMDflea that share this schematic

            https://www.badcaps.net/forum/showthread.php?t=85795
            thanks;;; salamatski...
            Never stop LEARNING because life never stops TEACHING!

            Comment

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              Lenovo ThinkPad E480 Notebook E Specification for Upgrade or Repair
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              This specification for the Lenovo ThinkPad E480 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the E480 boardview and E480 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo ThinkPad...
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              This specification for the Lenovo ThinkPad E480 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the E480 boardview and E480 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo ThinkPad...
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              by Document Archive
              This specification for the Lenovo ThinkPad E480 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the E480 boardview and E480 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo ThinkPad...
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              by Document Archive
              This specification for the Lenovo ThinkPad E480 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the E480 boardview and E480 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo ThinkPad...
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