Chosen Solution
Keyboard works normally until pressing the Caps Lock button. Hitting Caps Lock will make the keyboard unresponsive, you won’t be able to type anything after. Can’t even open up on-screen keyboard to turn off Caps Lock since it (on-screen keyboard) will hang on startup. Right now, it looks like restarting is the only way to bring back the keyboard. Really confused what the problem is. And my Google searches aren’t pulling up this specific problem. I should add that ONE key does respond after pressing the Caps Lock key: the Fn or Function key types the number one (1.) Aside from that, nothing else works. And it looks like opening the on-screen keyboard and turning on Caps Lock on it works normally. No keyboard hangups. No issues with turning on/off Caps Lock. Problem is when Caps Lock key is actually turned ON using the keyboard. That’s when everything stops responding. Even the on-screen keyboard stops responding though it’s working beforehand. Update (08/19/2020) It looks like there are other people who run into the same problem. For the newcomers (welcome to the club) and for the sake of visibility, here are possible solutions compiled from other messages in this thread: A. Disable the Caps Lock key using a reputable keyboard software found online. B. Disconnect all keyboard connections (and maybe all other connections as well) and put it back together. C. Replace the laptop keyboard. As I am inexperienced in opening up laptops, I went with option A. But I would suggest option B if you know how to. Another user has experienced the same problem and reconnecting all the, well, connections is what solved it for him. Good luck!
My computer is Thinkpad X220t. However, I have the same problem: when the Caps Lock key is off, everything works fine. When the Caps Lock is on and the led is lit, the system starts behaving erratically. Some windows freeze, other keys render wrong characters (ex euro E), etc. I’m using Ubuntu Linux. I suspect this problem is generated by a short circuit on the keyboard. Before ordering a new keyboard, I was wondering if you solved the problem and how (software, keyboard replacement or motherboard keyboard connector problem?) . I would appreciate a quick answer. Many thanks.
I am sorry to add to such an old thread but I am having the exact problem with my Lenovo Y520-15KBN and my warranty has just run out. So I was hoping you found a solution. Hope you see this.
I have a very similar problem. It came out if nowhere and I was not doing anything weird with my laptop. I’m using a Lenovo Legion Y530-15ICH When the problem first came out my first reaction was to reformat my laptop. But the problem still persisted afterwards. My first reaction was that it’s a hardware problem But after pressing caps lock. My laptop spams the number 6. A weird thing that I noticed was that even if I use the on screen keyboard on Windows 10 tablet mode it reacts the same way, and if I turn off caps lock on the on screen keyboard the physical keyboard work normally again. Because of this, I think this might be a software/virus issue. If I figure it out I’ll post an update.
I wish it was a software problem with the virus problem but it is not. Unfortunately you’re going to need to replace the keyboard because it is a short Unfortunately replacing the keyboard is one of the most difficult procedures procedures you can have on this computer. That said it is possible. Search YouTube for the procedure and the part should run you about $70.
