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Thread: USB Device Not Recognised

  1. 03-29-2011, 01:22 PM #1
    jmhcs
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    USB Device Not Recognised

    I am working on a Dell Dimension E510 WXP totally updated. The USB ports do not recognize either the mouse or keyboard at bootup time. It actually gives "keyboard failure" message before starting Windows.

    I installed a 4-port USB PCI card and that seems to work well but the others do not. I don't have a clue of what is going on.

    Any ideas??
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  2. 03-29-2011, 02:16 PM #2
    Steve R Jones
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    Was the OS recently reloaded and if so did you install the chipset drivers?

    You could try deleting the ports in device manager and rebooting to see if windows re-detects them.
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  3. 03-29-2011, 02:16 PM #3
    Midknyte
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    Did you check for a legacy setting for the usb keyboard in the bios? Try toggling that setting.
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  4. 03-29-2011, 03:47 PM #4
    jmhcs
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    This computer was reloaded about 6 months ago and has been running fine until this problem. I tried to reload the chipset but after opening the folder etc., it asks a number of qualifying questions and when I hit OK, goes immediately to FINISH as if it has done nothing.

    I cannot get into the BIOS using the keyboard that is connected to the PCI USB card.
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  5. 03-29-2011, 07:46 PM #5
    Midknyte
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    Did you try resetting the bios via jumper or popping out the battery?

    I'm guessing you tried all the different ports, including the front usbs.
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  6. 03-29-2011, 08:32 PM #6
    jmhcs
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    I did pop the battery. Gave me a bunch of problems (Date-Time, etc.) Almost couldn't reboot. Can't get into BIOS using F2 key. I have tried all ports. All ports in Device Manager says they are working properly.

    Without the PCI card, this would be a dead computer after booting into Windows. No keyboard - no mouse.

    I have never encountered this problem before.
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  7. 03-31-2011, 07:34 AM #7
    BipolarBill
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    Does the motherboard have any PS/2 (round) ports? If so, you can get a cheap PS/2 keyboard.

    My guess is that this is a real hardware problem - damaged power supply, surge-damaged motherboard.
    MS MCP, MCSE
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  8. 03-31-2011, 10:54 AM #8
    jmhcs
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    Bill-

    No PS/2 ports, only USB. I believe you are correct. Started working on it today and it would not even power up. Try a different PSU and it still wouldn't power up. Almost like no power going to the MOBO. The green light on the MOBO lights up but that is all. I tried using a post reader in a PCI port but nothing lights.

    I really don't know how to tell if the MOBO is bad but is suspect it is.
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  9. 03-31-2011, 07:03 PM #9
    BipolarBill
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    You have pretty much proven that it's fried already. Sorry.
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  10. 04-01-2011, 10:50 AM #10
    jmhcs
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    What causes a MOBO to go bad. We have had no electrical storms so no lightning. I don't think there was a surge but can't be sure. Do they just go bad???
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  11. 04-01-2011, 04:13 PM #11
    BipolarBill
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    Not usually. It happened a lot back in the days of bad capacitors. That's history though. A cheap power supply can kill a mobo. So can "dirty" power.
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  12. 04-01-2011, 09:35 PM #12
    Train
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    A lightning strike to power lines 20 miles away has fried lots of motherboards.
    Made good money in North Carolina because of stunts like that.
    Freezers, AC units and refrigerators, when shutting down really spike the voltage and ruin computers on the same circuit.
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