Help: USB keyboard only works after booting windows

[levelShiroe]

So this is the problem on my old laptop with a broken keyboard.

 

Everything is working fine when I was using the USB keyboard until I enabled secure boot on BIOS. At least that's what I know that causes it. 

 

After I enabled secure boot. I noticed USB keyboard doesn't have numlock light ON windows boots just fine. I attempted to reboot to revert secure boot but keys not working, went straight to windows desktop. Tried USB keyboard on notepad all keys are fine.

 

Then I removed the CMOS battery to clear the bios setting. Now this appeared.

By the way before this happened when I didn't touch secure boot. I can use the USB keyboard to press F2 and go to BIOS.

 

So back to the problem,

I tried:

• all USB ports of the laptop
• changed the CMOS battery
• leave the laptop without the CMOS battery for whole day
• leave the laptop with the CMOS battery for whole day
• Tried 3 kinds of USB keyboard 
• Plug-in power cable then hold the power button to 10mins.

 

nothing is working.

 

The next plan is to buy a replacement for the laptop's keyboard but I might run into compatibility issue as I'm not sure if the port where the ribbon cable goes still works fine.

[kb5zue]

Looks like you might need to replace the battery on the mobo too.  How old is the notebook and is it still running with the original battery?

[BoomerDutch]

Have you tried search through bios settings. I do remember that some bios have setting to toggle usb/usb power.

 

Maybe because of that it's not functioning.

 

You could also attempt to update the bios.

[levelShiroe]

2 hours ago, kb5zue said:

Looks like you might need to replace the battery on the mobo too.  How old is the notebook and is it still running with the original battery?

Omega old laptop she ttthheeeck the model is Satellite S870. I already replaced the CMOS battery

[levelShiroe]

3 hours ago, BoomerDutch said:

Have you tried search through bios settings. I do remember that some bios have setting to toggle usb/usb power.

keys not working on either of the keyboards.

[Kilrah]

Probably not much choice but to replace the original keyboard if you can't get into the bios. A CMOS clear never changes the secure boot status for obvious reasons.

[levelShiroe]

Is it true that using using USB to ps2 then using a Ps2 keyboard might bypass the secure boot? like the image below. I might go this route if there are no compatible replacement for the original keyboard.

[lolomid]

try Keyboard Troubleshooter from Settings