Asus z87 pro back USB ports not working suddenly

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  • Dark Knight_TJ
    Member
    • Sep 2015
    • 18
    • mx
    #1

    Asus z87 pro back USB ports not working suddenly

    Hi guys!. I have this Asus motherboard Wich back usb ports stopped working suddenly . I connect something and is not detected , just receives power but nothing appears in OS. I checked with multimeter in a working USB and I have 5v ,gnd and 0.025-0.030mv from data lines . Tested in the ones that are not working and I got same measures except for data líneas Wich are lower , about 0.010 MV or less . I think I have some failed "filters" ics Wich are marked as 027 30ECG but I didn't find any matches . Does anyone knows what are and what part number is needed please?. Thanks !
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    Last edited by Dark Knight_TJ; 02-13-2022, 03:47 PM.
    Tags: None
    • Yousuf
      Member
      • May 2019
      • 27
      • United Kingdom
      #2
      Re: Asus z87 pro back USB ports not working suddenly

      Hi,
      Can you please post the number of the isolator ICs ?

      If you are adventurous, you can switch the same IC from a working USB port to the non-working one and see if it works. Another option is to take the D+ D- (for USB2) before the chip, connect to a USB connector and see if there is any communication.

        Comment

        • bashatm
          Member
          • Dec 2021
          • 20
          • Canada
          #3
          Re: Asus z87 pro back USB ports not working suddenly

          Originally posted by Dark Knight_TJ
          Does anyone knows what are and what part number is needed please?. Thanks !
          LXES4XBAA6-027 Murata Electronics
          ESD Suppressors / TVS Diodes 0.25pF 6V 6ch EMI Suppression Fltr

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