Question about Logitech EX100 967499-0403 Keyboard

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Unable tio get the EX 100 Keyboard to connect.

The mouse connects ok, but I am unable to get the Keyboard to connect. In both cases using the same procedure.
Batteries are right up

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  • bear57821 Feb 02, 2009

    I am using a USB port for the mouse and keyboard(as per your instructions)

    What do you mean" another keyboard bar code??

    I think you are asking if I am using proper sequence to connect? If so I am using exactly the same sequence that I used with the mouse, again as per instructions.

    No I can not test in another computor.

    The keyboard is an EX 100.



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I've experienced the exact same problem :
mouse working ok, but i was unable to get any response from the keyboard.

i tried to update the drivers, i tried reinstalling the drivers on a clean boot, nothing would do. but then i tried to use my computer with a classic usb keyboard, which caused xp to detect both keyboards on startup, without managing to install either of them.

so that's how i found out my problem, which i hope is also yours, was that the proper driver for usb keyboards is not signed. so somehow xp would refuse to use it. forcing a manual install of that unsigned driver on both keyboards made the both of them finally work.

so if you have not tried that yet, i suggest you to reinstall your keyboard driver
without letting windows select the driver automatically (forgive any clumsy translation, i'm running a french version) :

1. find your keyboard in the device list (configuration panel > system > hardware > device list)
2. right click on it, go to properties, and choose reinstall driver
3. the installation wizard is then launched, tell him you wish to specify the location of your driver
4. in the second step of the wizard, tell him not to search for the driver, you'll select it manually from the list
5. in the list that appears next, select Human Interface Devices (my driver was in the HID section)
6. among the drivers in that section (there were 2 in mine), one of them is not signed, select that one and install it.

that's how i got my keyboard to work, hope this may be helpful to you in any way

Posted on Apr 30, 2009

  • jdwood18 Dec 18, 2010

    for some reason, only signed drivers show up... help please?

  • dario shinai Dec 19, 2010

    i've checked my drivers list again, some are signed and some are not. no matter what i do, i always see both signed and unsigned ones. the only question that comes to me is pretty silly but let's go anyways : did you install your mouse and keyboard drivers before going through the steps i've described oh so long ago ?


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What conection are you using? for mouse and kyb.
Remember that when must use or both ps2 or just usb.
Are you usiny another keyboard, barcode,...?
Are you using the corect secuence to sincronice? (see under kyb)
Can you test in other computer or whith other EX110?

Posted on Feb 02, 2009

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