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What would cause my computer keyboard to suddenly stop working? I have a 3 year old MicroExpress Desktop computer which was just moved to a different location (which leads me to believe that a circuit board simply needs to be reseated). My mouse is working fine. Initially, I assumed that my keyboard was bad, so I purchased another keyboard, but that did not solve the problem. Any suggestions? Thanks, Dave

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  • davidhigg392 Jan 30, 2010

    Hi Muebe,



    Thanks for your quick response.



    I should have mentioned that I am using a standard wired keyboard with a USB connection. Also, my previous keyboard was a wireless keyboard, also with a USB connection. My desktop computer has 8 USB ports, and I tried every one of the USB ports (I tried both keyboards, one at a time, as well).



    After opening the case, I tried to see if anything looked loose, but nothing stood out to my untrained eye. I also tried to see if the motherboard screws were loose, but they appear to be tight.



    Is it worth installing a new motherboard on a 3 year old computer? Maybe I should just bite the bullet and purchase a new computer. Any other suggestions? What would you do?



    Thanks,

    Dave

  • davidhigg392 Jan 30, 2010

    Hi Muebe,



    Thanks for your quick response. Please forgive me if I sent this follow-up question twice.



    I should have mentioned that I am using a keyboard with a USB connection. Also, my previous keyboard was a wireless keyboard, also with a USB connection. My desktop computer has 8 USB ports, and I tried every one of the USB ports (I tried both keyboards, one at a time, as well).



    If my motherboard is bad, does it make sense to spend money on a 3 year old computer? New computers are rather inexpensive, so maybe I should just buy a new one (I have everything backed up). What would you do?



    Thanks,
    Dave

  • davidhigg392 Jan 30, 2010

    Hi Muebe,



    I don't know if the PS/2 keyboard port works (both keyboards are USB keyboards).

    I do have a PS/2 mouse, and that works fine, as does my USB mouse.



    I tried to access the BIOS at boot up (by pressing the F2 function key), but it did nothing.



    Dave

  • davidhigg392 Jan 30, 2010

    Hi Muebe,



    Thanks again for your continued ideas. I followed your suggestions, but unfortunately, it did not recognize the keyboard.



    I suspect that this fix will require skills that are above mine. If it is not too expensive, I will have it repaired. Otherwise, I will have to buy a new computer.



    Thank you for your efforts.

    Dave

  • davidhigg392 Feb 01, 2010

    Hi Muebe,



    I suspect that you have seen some pretty strange things while dealing with computer problems. The solution to my keyboard problem is one for the archives:



    As you may recall, neither my wireless keyboard, nor my brand new wired keyboard worked on my computer. I had already consigned myself to buying a new computer, but on a lark, I decided to try both keyboards on another computer. As it turns out, both my wireless keyboard and my wired keyboard were inoperable.



    Thanks again for your assistance. Your input was helpful, as it caused me to dig a little deeper before giving up and buying another computer.



    Thanks,

    Dave

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Could be a bad keyboard connector plug on the board. It may have been damaged when it was disconnected from the port due to force or maybe static. You could try opening up the computer case and check to see if the port is loose or a solder connection might have come loose. If that is the case then you might be able to solder the loose connection back to the board. If the connection looks good and is not loose then the board might have a defective keyboard controller(will need new motherboard to fix). Also check all the screws that hold the motherboard to the chassi are tight because the motherboard uses these screws as a ground. And while you have the case open use a compressed can of air to clear out all the dust. Remember to ground yourself on the computer case metal or use a grounding wristband before touching the inside of your computer or static electricity could damage it. Also make sure it is unplugged of course. If it appears to be the motherboard keyboard controller is bad then I suggest that you purchase one of these http://www.usb-ware.com/usb-ps-2-adapter-uc451.htm then you can use a USB port to connect your mouse and keyboard. Or you can purchase a new wireless keyboard/mouse setup if you want to upgrade. Let me know if you have any questions.

Posted on Jan 30, 2010

  • 2 more comments 
  • muebe Jan 30, 2010

    So are you saying that the PS/2(keyboard port) is not working when the keyboard is plugged into it and the keyboard is not working when it is also connected to the USB port? I am assuming that the USB ports are all working. Does the PS/2 mouse port work? Does the USB mouse work? This problem could just be as simple as a driver issue. Are you able to get into the BIOS setup with the keyboard when you first turn on the computer? I have a feeling that when the power to the computer was unplugged to move it that might have caused the problem.

  • muebe Jan 30, 2010

    Try doing this. Shut down the computer. Then disconnect the USB keyboard. Then remove the power plug for the tower for about 10 seconds. Then plug the power back in and boot up the computer. Wait until the operating system is fully on(no more drive activity and you can see the desktop). Then plug the keyboard into a USB port and see if the operating system detects it and installs it. Hopefully this gets the keyboard working again. Let me know if that works.

  • muebe Jan 30, 2010

    Sometimes the USB keyboard connections are sometimes unreliable. Were you able to verify if any of the USB ports were working with another device? They do make an adapter that turns your PS/2 keyboard port to USB so you can plug your USB keyboard into the PS/2 keyboard port(as long as it works) and would only cost a few of dollars like this one here http://www.google.com/products/catalog?s...#



    But if you were looking for an excuse to buy a new computer then don't let me stop you;)

  • muebe Feb 01, 2010

    Well good job on that one. I would not have thought that both keyboards were bad but anything is possible. Most of the computer hardware problems simply require testing components and using the power of deduction to find the problem and fix it. Glad you fixed the problem and thanks for using FixYa.

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