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Locating fuses I shorted a USB and now all USB ports are not working. The computer still boots to the login screen just fine but I don't have a mouse or keyboard to go any further. From what I have been reading there are fuses that could have been blown that would stop all USB ports from working but I have been unable to locate them. Could you help me locate these fuses?

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  • Scott Hunter
    Scott Hunter Oct 21, 2013

    I reinstalled the drivers and now the front USB ports are working. Only the USB ports on the back aren't working now.

  • John Selph
    John Selph Oct 21, 2013

    First thing I would do is to check device manager and see if any USB devices show up yellow or red. If so, it could still be a software issue. If not, check system BIOS setup and make sure all USB ports are enabled. If all else fails, you can purchase a powered USB hub for just a few dollars and plug it into one of the working ports.

  • John Selph
    John Selph Oct 21, 2013

    Or, you could get an add-in USB card which would give you the rear USB ports.

  • Scott Hunter
    Scott Hunter Oct 21, 2013

    They are enabled in BIOS and they are not yellow or red in the device manager. It is a work computer where those ports are needed without an add-in or hub. I have to get it fixed or replace the motherboard.

  • John Selph
    John Selph Oct 21, 2013

    I don't think the fuses are user replaceable. Most techs will not address "board level" repairs, especially on motherboards since they are multilayer. If you can locate the bad fuse, sometimes a new one can be soldered right on top of the old one, but it's never a good idea to attempt to solder anything on a motherboard. If it were me, I'd opt for replaceing the mobo.

  • John Selph
    John Selph Oct 21, 2013

    One other thing to check is to open the case and see if there is another USB port on the mobo. Sometimes there is an unused USB3 or similar plug that could be used with a dual port USB "slot" adapter. I say this because I surmise that the rear port that is blown is the "embedded" port on the mobo.

  • Scott Hunter
    Scott Hunter Oct 22, 2013

    I am a R&D Electronics Tech so I am comfortable soldering on the motherboard. We have a board maker so I can make a board and attach to the motherboard if I need to. We are probably getting a new motherboard anyways but I would still like to fix this one. My area of expertise is not in computers though so I am having trouble locating the parts that would might be bad on the motherboard.

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  • Contributor
  • 37 Answers

Usually, if you short a USB port, only that port will be affected. Try booting to safe mode and reinstall the driver.

Posted on Oct 21, 2013

  • Scott Hunter
    Scott Hunter Oct 21, 2013

    I reinstalled the drivers and now the front USB ports are working. Only the USB ports on the back aren't working now. The short was plugged into one of the rear ports

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Posted on Jan 02, 2017

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muttuswami
  • 42 Answers

SOURCE: my usb ports aren't working at all

try reinstalling the chipset drivers from

http://support.dell.com/support/downloads/driverslist.aspx?os=WW1&osl=EN&catid=27&impid=-1&servicetag=&SystemID=PLX_GX620&hidos=WW1&hidlang=en

Select the Operating system
The Category as Chipset
Importance should be All
Click on the Intel driver
Download now
File name is R132539.EXE

If this does not work you will be having 2 usb at the back and in the front of the system.IF the back does not work than you need to get a local tech out at your place as it is a problem with the USB controller on the motherboard and that might have to be replced .If it is the front USB (Only if you have them) then there is a cable coming from the USB controller to the fromnt usb ports that cable might have got unplugged for that you need to open the tower.But i would still recommend a local tech.

Posted on May 27, 2008

  • 490 Answers

SOURCE: Unable to use my computer. Usb keyboard, mouse fail

See buddy


If the BIOS it self is not opening means that it is not getting started,at the timing of power startup it just goes off with out showing anything the issue might be with the BIOS cell check that out otherwise there might be any issue with the BIOS than u have to consult with the vendor,


Now in second case where it is not working after the POST is done than might be the first boot sector has gone faulty you have to reinstall the OS.


ANd in if case it is giving a long beep before shutting down the issue might be with RAM check that out.

Inshort the issue might be with three things
1) BIOS cell (change the bios cell)
2) BIOS itself (consult vendor)
3) OS (Reinstall the OS)
4) RAM (Swap or change the RAM)

PLz do rate incase this info is important or giving u any benifit it helps us...


Thanx
Gizmo

Posted on Dec 20, 2007

  • 139 Answers

SOURCE: Compaq EVO D500 Keyboard/Mouse Issues

Just read this carefully as you will get a problem to your solution.

My Computer ->right click ->properties ->hardware -> device manager -> in last you will find USB controllers -> unistall all the usb controllers one by one. Restart the machine and your USB devices will be working fine

Enjoy

Posted on Jan 13, 2009

SUPERMAN_B_1
  • 294 Answers

SOURCE: Dell C521 Will boot to User login But cannot use mouse or keyboar

did you try starting the computer with both mouse and key board allready pluged in so it can recanize that there pluged in,no any mouse and key board will work also did you switch the 2 to make sure you did'nt have them pluged in the others spot?

Posted on Mar 10, 2009

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