USB keyboard suddenly not working

[genexis_x]

My external USB keyboard suddenly doesn't work with my laptop. When it's connected, the backlight LED light up but I can't type anything. (my external mouse works fine)

 

Things I tried:
-unplug laptop from charger
-restart (a few dozen times)

-plug into different ports
-unchecking 'Allow the computer to turn off this device to save power' in power management tab in 'USB Root Hub' (in device manager)

-run Windows USB troubleshooter
-update, reinstall drivers (keyboard, trackpad, generic USB hub, chipset) in device manager
-uninstall hidden devices in USB controller in device manager

-uninstall all USB devices in USB controller in device manager

The most confusing thing is, the device didn't show up in connected devices, however I can't find any unknown device in device manager.
Also, one weird thing I had noticed is when I run the Windows USB troubleshooter, it says 'The USB controller is in a failed state or is not currently installed'.

 

Edit: Didn't work in BIOS either.

I've spent a few days trying to fix this but the USB keyboard still didn't work. Any help is much appreciated!

[ItsTheDuckAgain]

plug in another machine

works? good. needs to be investigated.

doesn't? throw away get a new one :-)

 

chances are that power still is transfered to the back light stuff but the controller actually controlling the input went dead. result would be no input but a functioning back light....

[genexis_x]

19 minutes ago, ItsTheDuckAgain said:

plug in another machine

works? good. needs to be investigated.

doesn't? throw away get a new one :-)

 

chances are that power still is transfered to the back light stuff but the controller actually controlling the input went dead. result would be no input but a functioning back light....

But I had this problem last week and weirdly, I fixed it by unplugging my mouse...

[ItsTheDuckAgain]

1 minute ago, ZM Fong said:

But I had this problem last week and weirdly, I fixed it by unplugging my mouse...

still: does it work on another machine? most important thing to test right now :-)

[genexis_x]

13 minutes ago, ItsTheDuckAgain said:

still: does it work on another machine? most important thing to test right now :-)

I don't have another machine with me right now

[ItsTheDuckAgain]

tv? phone with usb to micro usb thingy? literally anything will work (or not in your case :-) )

[genexis_x]

48 minutes ago, ItsTheDuckAgain said:

tv? phone with usb to micro usb thingy? literally anything will work (or not in your case :-) )

I'm at dorm not at home so everything isn't available here

[ItsTheDuckAgain]

and there is no other human being in a 600 mile radius that happens to have some fancy tec like... hmm... lets say a notebook? come on dude, get up and start moving! :-)