What is this chip ? Marking RE=7E

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  • Ado02
    Senior Member
    • Jul 2021
    • 100
    • United Kingdom

    #1

    What is this chip ? Marking RE=7E

    Can anyone tell me the correct model number for this chip?

    It's the one with RE=7E

    Thank you..
    Attached Files
  • stj
    Great Sage 齊天大聖
    • Dec 2009
    • 30931
    • Albion

    #2
    Re: What is this chip?

    what is it from? we may have schematics

    Comment

    • SMDFlea
      Super Moderator
      • Jan 2018
      • 20318
      • UK

      #3
      Re: What is this chip?

      It could be a richtek RT6585C



      https://www.badcaps.net/forum/showpo...84&postcount=2

      Is the motherboard part number NM-C921 ? https://www.badcaps.net/forum/showthread.php?p=1052338

      .
      Last edited by SMDFlea; 07-16-2021, 02:47 PM.
      All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

      Comment

      • Ado02
        Senior Member
        • Jul 2021
        • 100
        • United Kingdom

        #4
        Re: What is this chip ? Marking RE=7E

        Thank you for your replies.

        The motherboard is from a Lenovo Legion 5 - the laptop needed a screen change after being dropped. On installing the new screen then laptop would not power on. No sign of life.

        The component in question is getting very hot and looks likes it's got a burn mark.

        Please see the attached image for the motherboard model number.

        If someone has the schematic for this board please 🙏 let me know.

        Thank you
        Attached Files

        Comment

        • Ado02
          Senior Member
          • Jul 2021
          • 100
          • United Kingdom

          #5
          Re: What is this chip?

          Originally posted by SMDFlea
          It could be a richtek RT6585C



          https://www.badcaps.net/forum/showpo...84&postcount=2

          Is the motherboard part number NM-C921 ? https://www.badcaps.net/forum/showthread.php?p=1052338

          .
          That is the same problem but I would not say the screen was the problem.

          Comment

          • Ado02
            Senior Member
            • Jul 2021
            • 100
            • United Kingdom

            #6
            Re: What is this chip ? Marking RE=7E

            Could the problem be caused because the original screen was 120mhz and the replacement 144mhz?

            Comment

            • SMDFlea
              Super Moderator
              • Jan 2018
              • 20318
              • UK

              #7
              Re: What is this chip ? Marking RE=7E

              Originally posted by Ado02
              Thank you for your replies.

              The motherboard is from a Lenovo Legion 5 - the laptop needed a screen change after being dropped. On installing the new screen then laptop would not power on. No sign of life.
              The component in question is getting very hot and looks likes it's got a burn mark.
              Please see the attached image for the motherboard model number.
              If someone has the schematic for this board please 🙏 let me know.

              Thank you
              The motherboard part number will be silkscreened in white somewhere. When you find it use the forum search,it might be posted already,or post your request in the "Schematic Requests ONLY!" section here: https://www.badcaps.net/forum/forumdisplay.php?f=41
              All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

              Comment

              • SMDFlea
                Super Moderator
                • Jan 2018
                • 20318
                • UK

                #8
                Re: What is this chip ? Marking RE=7E

                Originally posted by Ado02
                Could the problem be caused because the original screen was 120mhz and the replacement 144mhz?
                I doubt it,it was probably caused from something shorting when dropped.The lvds cable could be damaged
                All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

                Comment

                • xnRS
                  Senior Member
                  • Feb 2021
                  • 85
                  • Belarus

                  #9
                  Re: What is this chip ? Marking RE=7E

                  well as SMDFlea said - it 99% is Richtek RT6585C
                  Check VIN pin on chip(SMDFlea gave link to datasheet) and check other pins(IMHO LDO3 and 5 are most important as they are 3.3V and 5V) so maybe it's not chip, but it probably is

                  Comment

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