Windows 10: My laptop keyboard randomly stopped working

There were some glitches while I was using PowerPoint. A message telling me to use "Ctrl + T" kept popping up and the error sound with no error message. I restarted my computer a couple times. Things were back to normal. I left to go get something. When I returned the keyboard was no longer responding when I typed. However the backlight still worked. Also when i held down the power button + up volume, it responded by giving me the option to turn my PC off. I checked to see if I had any updates. I'm up to date. I also reset my computer. It still didn't fix the keyboard. Other forums said to uninstall keyboard driver ps2... But I don't have that.

:)

 

Built-in keyboard in laptop randomly stops working / no response

Try again with the pictures... I also included other pictures of the damage the heat has done to the plastic chassis of the laptop. Over the years the heat has become so extreme that bits of plastic around the exhaust grill has melted or chipped off. Also, you can see how the underside of the keyboard takes the brunt of the heat from the CPU fan and battery which sits just underneath the keyboard wires (in fact just a bit of tape separates the keyboard flat cable and the swollen battery.













Well, just now I tried another tactic. I remember I bought some memory from eBay to push my the capacity form 8gb to 16gb last year and they have worked flawlessly. But I just now put the original 8gb back in to see if its the memory that's causing the weirdness. Although as I've said in my experience failing memory usually gives BSOD, random lockups and hang etc. I'd be surprised how a memory could affect a laptop keyboard in this way but it could be the reason why I was getting problems at boot...

The problem usually shows itself when the laptop has to restart from a cold boot so I'm going to now do a series of a cold boot to see if the issues comes back. If not then ill put the newer 16gb memory back in and do a memory test over the weekend.


I'm starting to think the bios or the regulator that gives power to the keyboard is faulty on the mainboard. Those two issues are expensive fixes though.

 

Keyboard randomly stopped working

My built in laptop keyboard stopped working after the computer randomly turned off by itself.

(Laptop is a Lenovo Ideapad).

I have tried:

Uninstalling drivers and scanning for hardware changes to reinstall them.

Entering safe mode (computer wouldn’t even start in safe mode).

Entering the BIOS to see if there were any changes I could make there (there weren’t).

Now I am getting Code 19 and Code 12 errors for the keyboard in Device Manager.

I’ve tried all troubleshooting steps on many websites, and nothing works.

External keyboards work when I plug them in.

Please help!!

 

Built-in keyboard in laptop randomly stops working / no response

Ok, so recently I found my Toshiba Satellite laptop keyboard sometimes stops working. Nothing at all. The number lock light stays on if it is on but no response from any of the keys....This happens sometimes at boot but sometimes it happens randomly after a successful boot. It can work for any amount of time and then stop working. On average though it usually happens within two hours though but can go all day before it happens again

I decided to take the nuclear option and reformat because I thought it was a virus.

So, after a reformat everything was good and then it started happening again. I haven't installed any software since reinstallation of windows.

I have another USB wireless keyboard and when to use that it works properly but the built-in one still doesn't work until I do a reboot and sometimes even after a reboot it doesn't work.


So what could this be:

1. My computer is 5 years old. Could it be that a dying CMOS battery could affect the keyboard and make it randomly stop working?

2. I also surmised that maybe there was a windows update that affected the keyboard but I haven't seen anything that relates to keyboard or other motherboard drivers being installed.

3. Or could it be the keyboard hardware itself, is it failing somehow? But why would it work properly sometimes after a reboot?

4. Or something else? that's why I came here to ask for suggestions or direct solutions



I appreciate any guidance on helping to solve this frustrating issue

PS:

I tried to use Event Viewer to see if there is an entry that would show if Windows has reported/noticed the keyboard malfunctioning but I don't know where to look in Event Viewer, it's above my technical ability to know exactly where to look. I have tried but I don't see anything obvious.



System Information:

System Model Satellite S50D-A

Keyboard Driver c:\windows\system32\drivers\i8042prt.sys (10.0.15063.0, 112.50 KB (115,200 bytes), 2017-03-18 5:56 PM)