Hp 2x usb ports not working

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • frankkrantz
    Member
    • Feb 2019
    • 12
    • uk

    #1

    Hp 2x usb ports not working

    HP BDL50 LAD704P (HP 250 G5 MODEL)

    Hi,

    Both usb ports have stopped working.

    Does anyone know what component may require replacement from looking at the enclosed photo, i have noticed if i plug a 5v supply usb lead into any of the 2 ports they both work again, (maybe that helps to diagnose the issue).

    Thank you
    Attached Files
    Last edited by frankkrantz; 02-09-2020, 10:18 AM.
  • Techtiger
    Badcaps Legend
    • Oct 2014
    • 1601
    • france

    #2
    Re: Hp 2x usb ports not working

    Check the voltage of US1 IC all pins

    Comment

    • frankkrantz
      Member
      • Feb 2019
      • 12
      • uk

      #3
      Re: Hp 2x usb ports not working

      will do thanks, what does US1 IC actually do ? should there be a voltage on all pins ?

      Comment

      • Vesko356
        VIP Moderator
        • Aug 2018
        • 4386
        • Bulgaria 🇧🇬

        #4
        Re: Hp 2x usb ports not working

        Originally posted by frankkrantz
        will do thanks, what does US1 IC actually do ? should there be a voltage on all pins ?
        It's switching the 5V from the motherboard side to usb port side, when you click right mouse button and select remove usb device it's cutting the power to the selected usb port.
        ----------------------------------------------------------------------------------------------------------------------------------------------------------
        All donations to Badcaps are welcome.
        Become a Badcaps supporter
        >>>>> click on this link to donate <<<<<
        Thanks to all supporters.​
        ----------------------------------------------------------------------------------------------------------------------------------------------------------
        Doctrina est fructus dulcis, radicis amarae.
        .

        Comment

        • Techtiger
          Badcaps Legend
          • Oct 2014
          • 1601
          • france

          #5
          Re: Hp 2x usb ports not working

          Originally posted by frankkrantz
          will do thanks, what does US1 IC actually do ? should there be a voltage on all pins ?
          This chip converts +5VALW to +USB3_VCCB (+5V)

          Comment

          • frankkrantz
            Member
            • Feb 2019
            • 12
            • uk

            #6
            Re: Hp 2x usb ports not working

            Where can i get this chip from if faulty, is there a work around or can i buy the chip ? thanks..

            Comment

            • Vesko356
              VIP Moderator
              • Aug 2018
              • 4386
              • Bulgaria 🇧🇬

              #7
              Re: Hp 2x usb ports not working

              Originally posted by frankkrantz
              Where can i get this chip from if faulty, is there a work around or can i buy the chip ? thanks..
              Workaround? Not recommended theoretical workaround is to short the 5V power line from motherboard to usb port, but you will stay without any protection in case of short to ground at usb side, so it's very dangerous including for the cpu, hub and so on, just replace the part.
              ----------------------------------------------------------------------------------------------------------------------------------------------------------
              All donations to Badcaps are welcome.
              Become a Badcaps supporter
              >>>>> click on this link to donate <<<<<
              Thanks to all supporters.​
              ----------------------------------------------------------------------------------------------------------------------------------------------------------
              Doctrina est fructus dulcis, radicis amarae.
              .

              Comment

              • frankkrantz
                Member
                • Feb 2019
                • 12
                • uk

                #8
                Re: Hp 2x usb ports not working

                ok thanks, i understand, where can i buy the part ? i can't find a referance to it anywhere online...hope you can advise..

                Comment

                • Vesko356
                  VIP Moderator
                  • Aug 2018
                  • 4386
                  • Bulgaria 🇧🇬

                  #9
                  Re: Hp 2x usb ports not working

                  Originally posted by frankkrantz
                  ok thanks, i understand, where can i buy the part ? i can't find a referance to it anywhere online...hope you can advise..
                  Find datasheet for your board, search for US1 in it, when you find it part name will be written there, so with that information you can surch and buy the component.
                  ----------------------------------------------------------------------------------------------------------------------------------------------------------
                  All donations to Badcaps are welcome.
                  Become a Badcaps supporter
                  >>>>> click on this link to donate <<<<<
                  Thanks to all supporters.​
                  ----------------------------------------------------------------------------------------------------------------------------------------------------------
                  Doctrina est fructus dulcis, radicis amarae.
                  .

                  Comment

                  • frankkrantz
                    Member
                    • Feb 2019
                    • 12
                    • uk

                    #10
                    Re: Hp 2x usb ports not working

                    Unable to find a datasheet at the moment, no referance to K1126, maybe someone knows it as another component name i cant find any info at all on this ic ..thanks

                    Comment

                    • Vesko356
                      VIP Moderator
                      • Aug 2018
                      • 4386
                      • Bulgaria 🇧🇬

                      #11
                      Re: Hp 2x usb ports not working

                      Originally posted by frankkrantz
                      Unable to find a datasheet ...
                      Try harder

                      SY6288D20AAC_SOT23-5
                      Attached Files
                      Last edited by Vesko356; 02-10-2020, 10:04 AM.
                      ----------------------------------------------------------------------------------------------------------------------------------------------------------
                      All donations to Badcaps are welcome.
                      Become a Badcaps supporter
                      >>>>> click on this link to donate <<<<<
                      Thanks to all supporters.​
                      ----------------------------------------------------------------------------------------------------------------------------------------------------------
                      Doctrina est fructus dulcis, radicis amarae.
                      .

                      Comment

                      • frankkrantz
                        Member
                        • Feb 2019
                        • 12
                        • uk

                        #12
                        Re: Hp 2x usb ports not working

                        Thank you,

                        Here's an odd thing, i disconnected the ribbon cable to the other single usb port on the right hand side of the laptop today (this has always worked ok) & (see photo enc) & to my surprise the 2 x left usb ports sprung back to life...does this still mean "US1" ic as previously mentioned is still faulty please, when i plug the right side back in the 2 left ports go dead again..it's an odd thing going on, hope somebody can advice before i commence to replace components...
                        Attached Files
                        Last edited by frankkrantz; 02-11-2020, 11:03 AM.

                        Comment

                        • ktmmotocross
                          Boardkiller
                          • Feb 2014
                          • 3578
                          • slovakia

                          #13
                          Re: Hp 2x usb ports not working

                          thats why u must measure before replace.
                          check if that connector is not broken and give us picture of that usb

                          measure resistance to ground/outer metal part to pins of that connector

                          Comment

                          Related Topics

                          Collapse

                          • DynaxSC
                            GIGABYTE X299 AORUS ULTRA GAMING - SATA PORTS 4-7 NOT WORKING ???
                            by DynaxSC
                            Hi,

                            I have the above mentioned bord after repair, which was related to a lot of missing smd devices on the back of the board.
                            There were almost 20 devices missing, caps, resistors and some diodes/mosfets.
                            The board is generally working now, all PCIe ports are working, Windows installs normally.

                            However I have a problem with SATA ports 4-7 (the board has 8 SATA ports) - disks are not beeing recognized by the BIOS neither by Windows (which is usually normal in case BIOS does not recognize them).
                            The SATA 4-7 driver network is quite simple chipset<->buffers/drivers<->SATA...
                            03-10-2025, 12:27 PM
                          • Fluxi_77
                            HP 355 G2 Left USB Ports and Ethernet Port not working
                            by Fluxi_77
                            Hello Guys,
                            I currently have a problem with an HP 355 G2 where the right USB Port works without a Problem but the left ones and the Ethernet port which is also in the region of the two USB ports are not working.
                            The HP Hardware Diagnostic tool also shows them as faulty. I used a USB tester and it also shows that I don't have 5V on the ports so I suspect a problem with an IC that controls the Voltages that goes to this ports.
                            Unfortunately I found no boardview or schematic for this device and I am a newbie in tech repairs so I don't know where to start. Other than this problem...
                            02-19-2025, 12:29 PM
                          • techpointhull
                            S3 Graphics LS3440 - Analogue not working on both DVI-I ports
                            by techpointhull
                            Hi Guys,

                            Weird one here. I have a special GPU made by DFI (Model LS3440) from an Arcade gaming machine. The GPU uses the S3 440 GTX Chipset, and has dual DVI-I ports. For some reason, the analogue has stopped working on both outputs (DVI-I to VGA cable). DVI-D and digital outputs work fine, just the analogue that has stopped working.

                            Now, I could get around this by using Active cables to convert the signal over to Digital, but its got me wondering exactly what the issue could be. I have inspected the GPU and DVI ports under my microscope, but nothing stands out. Because...
                            12-06-2023, 10:30 AM
                          • MichelinMan
                            CF-20 Toughbook (mk1) Trackpad/Touchpad and USB ports not working
                            by MichelinMan
                            Hey guys,

                            Just purchased a CF-20 (mk1) supposedly was all working. However, the seller had done a fresh install of windows 10 but did not install any driver. Seller was adamant the trackpad/touchpad was working.

                            The touchpad/trackpad does not work. No led lights near the trackpad. The keyboard works, the USB 2 port on the base does not work, The USB 3 ports will recognise a USB 3 flashdrive but did not recognise a USB mouse. The ethernet port on the keyboard section works.

                            The USB 3 port on the actual tablet section works with no issues.
                            ...
                            07-18-2023, 08:12 AM
                          • Document Archive
                            Lenovo ThinkPad P43s Mobile workstation P Specification for Upgrade or Repair
                            by Document Archive
                            This specification for the Lenovo ThinkPad P43s Mobile workstation 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 P43s boardview and P43s 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...
                            09-06-2024, 09:40 AM
                          • Loading...
                          • No more items.
                          Working...