keyboard USB not recognized.

Yosemite on iMac 27 in.

Following a system freeze (screensaver is the alleged perpetrator), the usb keyboard is not recognized.  The mouse works in all ports and when it is plugged into the keyboard. IPhone recharges also through the keyboard. Recovered last time after several reboots and keyboard buffering in after start-up.  This time, no luck. Next steps?

Hello

I had EXACTLY the same problem.

New iMac and USB keyboard. He works first and the iMac would stop then find the keyboard.

I tried to reboot several times, but that did not always help. My Bluetooth mouse doesn't work. I get to the login screen and I can't type my password (because my keyboard is not be found). I get a message on my screen that the bluetooth keyboard is "impossible", when I don't have a bluetooth keyboard and my USB keyboard is plugged. I tried all USB ports, no luck! I just found a strange way around the issue. I used a keyboard extension cable to plug into the same USB keyboard and it works now. No logical sense... I hope that this might work for you too. Good luck!...

Tags: Mac

Similar Questions

  • keyboard USB not recognized by when you try to install from WinXP cd

    Try to make an own insntall of Win XP on a computer with malware.

    Everything is normal until the installation program screen 'welcome. '

    You will need to press Enter to continue but usb keyboard apparently not recognized.

    Have you tried several keyboards usb with the same results.

    P.S. the usb keyboard works well at startup F3 goes to the system setup and F12 brings

    Start menu.

    Thank you

    .

    Check your BIOS settings, it may be an option to enable or disable the USB keyboard and set it to "Enabled".

    J W Stuart: http://www.pagestart.com

  • My keyboard is not recognized by windows when connected to the USB ports.

    My keyboard is not recognized by windows because that is malfuncioned or something else, that's what I get a message when I insert the keyboard to the usb port that could do because the ports are fine.

    Original title: keyboard problem

    Hi Caragata,

    Perform the steps from the link below and see if it works.

    Tips for solving problems of USB devices

    Note: This article also applies to Windows 7. If the fix it does not work, you can then run the built-in utility.

    Good day!

  • Equium A100-063 - keyboard is not recognized

    Hi all

    I have a Toshiba Equium A100-063 (PSAAQE-00G006IT).
    The keyboard does not work, the usb keyboard does not work even in the bios.
    I disassembled the PC and unplugged the keyboard but does not work (even in bios).
    I formatted the PC and even the on-screen keyboard does not make me see the letters on the buttons.
    I searched on all sites of the Toshiba driver or bios update for this but found nothing.

    Can you help me?

    It is not easy getting started with comments. As you know on this virtual path, it is not easy to say what the problem is here.
    If the keyboard does not work you must replace it with a new one.

    When you say that the keyboard is not recognized even in the BIOS doesn't mean that the keyboard is not recognized in Windows?
    External keyboard is connected with a USB cable?

  • Why am I suddenly "USB not recognized, one of the devices USB has malfunctioned and Windows does not recognize"

    Hi all. If anyone out there in Cyber Land can solve this problem for me so I've personally you will issue an eight-pack of ice-cold beer (or a bottle of wine for the ladies lol)...

    I'll try not to waffle too guys, so here's...

    Right my PC running Windows XP. I also have itunes installed on my PC (I have an iphone 4). Upward until yesterday my iphone and itunes were working well, (once I plugged my iphone in the itunes USB port recognised that my iphone was plugged and synchronization was fine etc.).

    But now when I plug my iphone to PC to sync with itunes, I get a pop up box on the lower right part of the screen that reads... "USB not recognized one of the USB devices has malfunctioned, and Windows does not recognize."

    After visiting about 5 different sites now "Ways to solve this problem", believe it or not, I still have the problem bloody! :(

    A site proposed shutdown PC and unplug it from the power supply, then plug it back start-up and back... this as did not work!
    The other they say that I should go to Device Manager, uninstall all the USBs then restart... it did not work either.
    Tried a system restore
    Tried to reinstall itunes

    When I check the names USB in Device Manager, there is one who reads unknown device. I am literally pulling what's left of my hair now. I tried to solve this problem for almost 2 days now and still no joy. That's why no matter what input you guys would be very appreciated. I'm no PC Wizard, so please, don't think you're patronizing me if you break down things step by step for me.

    Thank you comrades, cordially, Freddy frustrated. :)

    Another said I should go to Device Manager, uninstall all the USBs and restart.

    Usually, this works... but can be very dangerous, unless you have a PS/2 keyboard.

    I also assume that you have tried all other USB ports on the computer. tried a verified USB device (for example, a flash drive) in the USB usually when you plug in your iPhone. and I tried your iPhone in another computer (I know it's rare for an error message Windows really means what he says, but sometimes the material lacks).

    Is the charge of the iPhone when it is connected to the USB port (I don't think)?  This happened to me recently, but a reboot fixed it.  I guess that that happened to you.

    I guess that you don't see the error messages in Device Manager or you must declare them.

    You can uninstall all USB devices that do not exist as follows:

    • Open a command prompt window (start > run > cmd > OK)
    • Enter the following command and press enter

    Set devmgr_show_nonpresent_devices = 1

    • Start the Device Manager by typing the following in the same command prompt window

    devmgmt.msc

    • In Device Manager, click the view menu and select "Show hidden devices".
    • You should see a category just after "Non-Plug and Play drivers" named "other devices."  Chances are that there will be a big exclamation yellow mark beside it.  When you expand the "other devices" you should see several non identified "USB devices."  Uninstall all this.
    • Reboot (with the iPhone NOT connected).
  • Peripheral intermittent USB not recognized problem in loop

    Hello

    I have a Dell Precision M6500 laptop in a docking station with a USB keyboard and mouse attached running Win 7 Pro 64 bit.  Most of the time, the machine works fine without any problems, but sometimes, Windows will in this tight where loop every few seconds, it appears the dreaded ball peripheral USB not recognized - even if I have not added/changed and the USB device on the machine.  I tried to disable the device, uninstall the driver, etc, but nothing I do seems to fix the problem.

    Please help because it drives me crazy.

    Thank you

    Robert

    It turns out that Dell thinks it's a hardware problem.  Theyu replaced the docking last week and that made it better for 3 or 4 days, but now he's back.  They will replace the motherboard this week, so we'll see...

  • USB not recognized on Windows 7

    Hello
    I have a problem. I instaled Windows 7 USB and mouse does not (USB not recognized-pop up on my desk).
    PLS, can you help me to solve this problem?

    Hello

    What model of laptop do you have?
    On the European driver Toshiba Satellite A350 series page I could find the registry patches. I think you should install it!

    In addition you should check the support page of USB devices maybe your Win 7 peripheral USB needs drivers

  • HP LaserJet P1102: USB not recognized during installation of HP LaserJet P1102

    I have a Sony Vaio VPCEH computer laptop with Windows 7 and when I run the disk I got with the printer on my laptop, that the installation procedure works in what concerns the section "Install printer Software". When you are prompted to turn on the printer and connect the cable USB to the laptop it says 'USB not recognized '.  I tried all 4 slots USB into my laptop but the USB still appears as an unknown device with an exclamation point in a yellow triangle. I searched internet solutions and tried to uninstall the unknown device in Device Manager and restart the installation with the disc, I also tried clicking on the unknown device driver software update but it says the software driver is up to date and still, it shows as an unknown device and is not recognized. I also tried to uninstall the HP software from the disc on my laptop and that reinstall but nothing has worked. I felt for over 2 weeks now and have not been able to use it because of this problem and I really need for University, so I would be very happy if someone could please give me a solution to this problem

    Hi @Janemaguire,

    Have you tried another USB cable?

    Because the printer is not detected on the Mac, it may be the USB port of the printer.

    What happened when you tried to install the printer on Mac?

    Error messages?

    What is the model Laserjet P1102w?

    Let me know. Thank you.

  • "Usb not recognized" keeps blinking and endangered

    Hello, the notebook of a colleague, she has the message "USB not recognized" that appears for a few seconds, then disappear. Sometimes it will come back repeatedly, sometimes he disappears for long periods of time. When I was reviewing its system, is come/gone several times, disappeared for a few minutes, then flashed again once again.

    She uses a laptop HP ProBook 4310 S. It uses two USB ports. One for its wireless mouse and the other to a Kensington Displaylink (allows for laptop > Displaylink > external monitor via the USB port), who worked without interruption throughout my check.

    Any thoughts?

    Hi phill.

    I suggest an update of the s chipset driver:

    http://h20000.www2.HP.com/bizsupport/TechSupport/SoftwareIndex.jsp?lang=en&cc=us&prodNameId=3974410&prodTypeId=321957&prodSeriesId=3974409&swLang=13&TaskID=135&swEnvOID=1093

    You should check to make sure that it is your laptop model.

    Chris
    Microsoft Answers Support Engineer
    Visit our Microsoft answers feedback Forum and let us know what you think.

  • Keyboard is not recognized therefore not connect to trouble shoot in XP Home

    Keyboard is not recognized. I think it's a driver problem. Last good config and tried to go into safe mode but without keyboard does not help. I bought a wireless keyboard, hoping it is plug-and-play, but it won't recognize it without having to download the software I have to do it from this site... of course, I can't do it because I don't have a keyboard. Help!

    Hello

    1. What is the brand and model of the keyboard?

    2. you get any error message when you connect the keyboard?

    3. don't you make changes to the computer until the problem occurred?

    I suggest you to try the steps below and check if it helps.

    Method 1: Try running the Fixit tool from the link below.

    Hardware devices do not work or are not detected in Windows:
    http://support.Microsoft.com/GP/hardware_device_problems

    If you use Microsoft keyboard then I suggest you download the drivers by choosing the model from the link below.

    http://www.Microsoft.com/hardware/en-us/downloads#keyboard

    Hope this information is useful.

  • Device USB not recognized (malfunction)

    I went on my external hard drive and an error message came - USB not recognized - device due to a malfunction. I tried switching off all voltage and turn support but still the same voltage. Then I went to print something and the same message came. However, I used my printer today without any problem. I don't know what happened. Advice please? Thank you very much. Aide-de-camp

    Hello ~ thanks for the reply.

    Just to say that I read somewhere switch all switch off and leave it for half an hour - then turn on everthing. Miraculously - it worked!

  • FAT corrupted USB not recognized

    I have problems with my rocket GB 8. This morning, while trying to fix my flash drive I accidently deleted the partition off my rocket. Of course, now I'm reeciving 'Fat corrupted' error on my fuse and USB will not recognize. I've searched high and low. I tried to power it in 20 seconds, put the "rocket" on hold, then press on the< rewind="" button="" (and="" center="" buton)="" while="" connecting="" the="" usb="" and="" i="" still="" receive="" the="" usb="" not="" recognized="" in="" windows="" (xp,="" vista="" &="" 7).="" i="" even="" tried="" using="" my="" wife's="" laptop="" with="" vista="" with="" the="" same="" usb="">

    Please tell me I didn't have the toast when I messed up the partition! Help!

    Finally, after the persistence, I got the computer to recognize the "rocket". Managed to format to FAT32 via Windows without any problem, then via the "rocket". All is well now.

  • Deviice USB not recognized. Help, please.

    So I have this Freecom 500 GB Portable external Hardrive and I have used it for several months now. It worked fine on my laptop and other computers, I'll until recently, when I plug it says: ' "USB device not recognized.". I click on the USB icon and it said: "one of the devices attached to this computer has malfunctioned, and Windows does not it." he has never done this before. In addition, there was a 'recommendation' which suggests I 'try to re-connect. If Windows does still not it, replace the device. " So I tried and tried (reconnection) but it's the same thing. USB NOT RECOGNIZED. I tried on the laptop of others and computers and the same thing happened. I have important documents stored on this hard drive... I don't think that the computer is at fault, rather my hardrive, but I'm not sure. What do you think? And are there ways I could solve this problem?

    Hi Elysem,

    As you have checked the hard disk on other computers and it gives the same error message that means there is a problem with the hard drive so I suggest you contact the manufacturer of the hard drive to get help.

  • both bluetooth and usb not recognized, couldn't able to start and shut down properly. The message of the usb not recognized

    popping up the message usb not recognized. It occurs when the network was slow and tried to disconnect internet directly unplug and plug the usb between mobile phone and pc. then it does not go away even system restore has been made. In addition, the bluetooth does not work. When I stopped PC properly but it will restart. at the same time when I start it up, but it does not occur. I closed again and then start again and works. However, it appears the message usb not recognized frequently.

    To start with, try running the Fixit USB, here http://support.microsoft.com/gp/hardware_device_problems

  • USB not recognized on the computer. Error code 43.

    Printer was working fine and then - after Microsoft updates have been installed - USB not recognized-Code 43

    Have you tried the new usb - port, nothing works

    Thank you

    We uninstalled the printer and then tried again the USB and it worked

Maybe you are looking for

  • Blue screen stop error message. __

    I'm in serious trouble. I use Windows XP service pack 3. I reloaded the OS after formatting the hard drive. all measures have been taken as advised. I was not able to detect the device that is causing a FALSE START of the windows and then blocking th

  • How to detect the runtime location?

    Hello In our application, we want to detect the current location at run time. ? You people can suggest me some excerpts from code or some references or article that can help me to do this. ? Thanks in advance and keenly awaiting response. Kind regard

  • ISE Sponsor authentication via RADIUS

    My client demand change us the way the sponsor users are authenticated and authorized to access portal Sponsor of ISE. Their similar to the request of the ISE AD via a RADIUS server first. They said "avoid sending credentials of the AD to ISE directl

  • Why Adobe did you call another company to solve a problem downloading

    I contacted Adobe by phone at the 844-852-6315, because I could not download the adobe program manager with updates.  The tech took the computer and told me that I had a Koobface malware in my network on the computer.  I was transferred to a supervis

  • The arrow "Go to the next Page" should open the next chapter?

    I use FrameMaker 12. I think remember that in a previous version when you reach the last page of a chapter of a book, the 'Go to Page' arrow would open the next chapter. I dream that upward?