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Cant run more than 1 USB device.

By pioneerx01
Jan 21, 2008
  1. Hi,

    I have WinXP machine (not the one you see on the bottom) in very good condition. Newer PSU with sufficient wattage, yet I cant run more that 1 USB device (no hubs). I have my printer connected in, but if I plug in as flash drive, scanner, or a hard drive none come as "recognized." If I kick out the printer I can work the other one and only one. The USB ports are all fine and so are the devices.

    What do I do?
     
  2. kimsland

    kimsland Ex-TechSpotter Posts: 18,353

    I wonder if it's actually one of the USB devices that you are always trying (printer?) can you try two other USB devices.

    Also go to device manager; right click on the USB devices and check for updates online.
     
  3. Are these all bus powered devices or do they have their own power adaptors?
     
  4. kimsland

    kimsland Ex-TechSpotter Posts: 18,353

    I gather:

    Printer -Yes
    Scanner - Yes
    Flash Drive - No

    Not sure what is doing it myself though
    Just trial and error at this stage, try this try that
     
  5. pioneerx01

    pioneerx01 TS Maniac Topic Starter Posts: 347

    I can work only one device at a time (printer or not). In any combination only one works and that is the one that is plunged in first. Printer and HDD have their own power supply, flash drive and scanner do not, however non of them work together in any combo even if both have the Power elsewhere.
     
  6. Cybersciver

    Cybersciver TS Rookie Posts: 41

    Sounds like a USB driver hasn't been installed. Have you checked in Device Manager? Assuming your XP is SP2 you'll have the USB driver on board ready to go.
     
  7. Cybersciver

    Cybersciver TS Rookie Posts: 41

    I should've said USB 2.0 driver.
     
  8. pioneerx01

    pioneerx01 TS Maniac Topic Starter Posts: 347

    All the drivers are fine. Front and back. I can work one device on any port on the PC and one device only (even runs 2.0 lol ). It must be something else.

    And you know come to think of it my PC at work has the same problem. I have (had) USB printer hooked up and when I plugged in my flash drive...nothing. Unplug the printer and it works again.

    Could I be the unknown variable I am looking for?
     
  9. kimsland

    kimsland Ex-TechSpotter Posts: 18,353

    Must be either your flash drive hurting USB's on computers
    Or your flash drive contains a bug, which is affecting computers

    In both cases the damage is done even after removing it.

    By the way you are following safe removal practice, not just pulling out the stick, I take it.
     
  10. pioneerx01

    pioneerx01 TS Maniac Topic Starter Posts: 347

    Like I have said:
    It is not the flash drive solo. any other USB device.
    And I have learned about the save removal procedure hard way some time ago, if you know what I mean...
     
  11. kimsland

    kimsland Ex-TechSpotter Posts: 18,353

    No I mean by using your flash drive on the computer, now they are faulty, even without it.
    ie it's the only common denominator here.
     
     
  12. pioneerx01

    pioneerx01 TS Maniac Topic Starter Posts: 347

    flash drive is just an example of USB device that is not working. Take it out of the equation and you still have HDD, scanner, and printer. And I still can work only one at a time
     
  13. kimsland

    kimsland Ex-TechSpotter Posts: 18,353

    Even on another computer, that has had your flash drive plugged into?
    If so then I can only think the flash drive has caused issues



    Sorry must leave for awhile, be back 10 hrs from now !
     
  14. pioneerx01

    pioneerx01 TS Maniac Topic Starter Posts: 347

    it is not the devices that cause the problem. I have 3 other PC's and they can all run all the devices at once and then some...
     
  15. Po`Girl

    Po`Girl TS Rookie Posts: 668

    As a basic troubleshooting step go to the Device Manager and uninstall all

    USB controllers,then shutdown the computer and attach two USB devices then restart

    the computer.

    The only other thing i can think of is some issue with drive letters.

    If you have a lot of network shares that can use up drive letters,maybe ?
     
  16. pioneerx01

    pioneerx01 TS Maniac Topic Starter Posts: 347

    I will try that...

    I should still have about 15 free letters.
     
  17. kimsland

    kimsland Ex-TechSpotter Posts: 18,353

    I wonder if this some type of trojan, that both computers have.
    Possible the original trojan is now not on the USB drive, but still in Windows.

    Or it is a specific program only running on the home and work that is causing it.

    Seems strange that 2 computers have the same issue, with a unique fault.
     
  18. pioneerx01

    pioneerx01 TS Maniac Topic Starter Posts: 347

    If the problem would be on my PC only I would be inclined to Trojan, but at work we use hefty security protocols, and I don't thing Trojan would slip by undetected for such a long time. Also The work PC was re-imaged less than 4 months ago and the problem was there since the beginning.
    In addition I use the USB drive on all my 4 PC's at home and only one has the problem and none others have detected any viruses lately.

    At this point I am very inclined to point to my PC power supply. That seems to me most logical explanation at this point in both cases. PC at work is few years old and so is my PC. Both run long periods of time and PSU's were not exchanged ever.

    I will explore that possibility once I have time.

    If you have any more ideas keep'em coming...
     
  19. kimsland

    kimsland Ex-TechSpotter Posts: 18,353

    Power supply is a good idea
     
  20. Cybersciver

    Cybersciver TS Rookie Posts: 41

    Everything should work via a usb hub if your power supply is the problem.
     
  21. dgower2

    dgower2 TS Maniac Posts: 340

    A "Powered" USB hub. Some aren't powered externally.
     
  22. dgower2

    dgower2 TS Maniac Posts: 340

    Have you checked/toggled the USB settings in the BIOS? Have you logged in as Administrator and tried it?
     
  23. kimsland

    kimsland Ex-TechSpotter Posts: 18,353

    Hi dgower2, do not quote the post directly preceeding yours.
    As this is the post you are replying to already

    Also do not Reply to yourself (even with a new comment) better to use Edit

    In regards to Admin, why I didn't I think of that ! Well done.
     
  24. pioneerx01

    pioneerx01 TS Maniac Topic Starter Posts: 347

    Well, I don't think that is entirely true. USB needs 5.5V @ some number of amps. If the PSU is supplying only 4.5V @ less amps for exmaple it might not work. That would explain why devices with their own PSU are working better.
    It is like starting a car with 9V battery. You need 12V for that however the car might start or might not. It depends how big the car is. (And here in Cleveland how cold is it outside as well..lol)
     
  25. Cybersciver

    Cybersciver TS Rookie Posts: 41

    Sorry, I thought that was obvious.
     
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