Member Avatar for kurtis244

I have a desktop that im running windows 7 on and I had a keyboard for about 3 years and it died. I got a new one and instaled it and it reconizes it but it still does not work. I have tryed 3 more keyboards and they dont work at all.I have unpluged and restarted and pluged them in and nothing.I have tryed every thing I know of. Please help.

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: trying multiple keyboards that Windows “sees” but that produce no input usually points to an OS/driver/service layer or USB power/controller problem rather than four broken keyboards. and were right to look at the USB/chipset stack, and ’s suggestion to try different ports is useful — below are targeted isolation steps and safe fixes you can run now.

First, isolate hardware vs Windows: reboot and verify the keyboard works in the BIOS/UEFI menus (if it does, the motherboard and ports are OK; if not, hardware or firmware). To test outside Windows, boot a Live USB (choose “Try” / demo mode) and check whether keys respond there — this quickly shows whether Windows is the issue. (documentation.ubuntu.com)

Next, remove stale/ghost drivers and check USB power behavior. Run these two commands from an elevated Command Prompt to show non-present devices, then open Device Manager and choose View → Show hidden devices; under Keyboards and Human Interface Devices uninstall any greyed-out or duplicate entries, then Action → Scan for hardware changes:

set devmgr_show_nonpresent_devices=1
start devmgmt.msc

See Microsoft’s Device Manager guidance for this procedure. (support.microsoft.com)

Also look at each USB Root Hub’s Power Management tab and clear “Allow the computer to turn off this device to save power” (and consider temporarily disabling USB selective suspend) — Windows power management can make USB input disappear. If you remove controllers, restart so Windows reinstalls them. (support.microsoft.com)

If the keyboard still won’t send input inside Windows, run the System File Checker from an elevated prompt to repair corrupted system files, then reboot:

sfc /scannow

Follow Microsoft’s SFC guidance and review the log if problems persist. (support.microsoft.com)

Finally, confirm the Human Interface Device Access (HidServ) service is not disabled (it affects HID functionality) and test in Safe Mode / a clean boot to rule out third‑party keyboard/filter drivers (Logitech/SetPoint, Razer, KVM software, remappers). If making driver or registry changes, create a System Restore point first. (learn.microsoft.com)

If these steps don’t fix it, report whether the keyboard works in BIOS/Live USB and what you saw in Device Manager (hidden entries, yellow triangles, or Event Viewer USB errors) so the next diagnostics can be focused.

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Member Avatar for laosland_1

Can you try to reinstall your chipset drivers for your motherboard? If you've tried other keyboards it's very unlikely that it is a keyboard issue. Maybe removing the USB drivers and having windows refind them might help as well. Do you have any other USB devices that you can install and see how it behaves? It's possible that your USB controller is shot, if everything else fails.

Member Avatar for rubberman

Why did the old keyboard die? Was it the keyboard, or something with the USB port and/or internal hub of the computer? You need to obtain and run hardware diagnostics to determine what the problem is. From your description, my guess is that the hub you are plugged into is faulty. Most systems these days have 2 internal hubs, one that runs the front ports, and another that runs the back ones. Try switching the port you are using, if you haven't already.

Member Avatar for thepastimer

Since your computer detects the keyboard and installs drivers for it I don't think its a hardware issue. Reinstalling/ updating your usb and chipset drivers sounds like a pretty good idea to me. It may even have something to do with the original keyboard drivers but I'm just wildy speculating on that.

Member Avatar for manojrea

Did you check properly? I think there are hardware issue call any hardware engineer if possible or try one more time to change your back side or if if it's in front.

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