Caps Lock does not work on crypt screen(and only on login screen)

Today turned on my notebook and the caps lock key was not working on the encryptation screen.That is a problem because my password has capital letters.so for curiosity I pressed esc and I was show a screen where I could write my password as well.there I could use the shift key to write my password (shift key does not work on the crypt screen) and it worked! In the login screen the caps lock worked as usual but now I turned on my computer again and the problem persists but the solution of pressing esc does not work anymore because it looks like the shift key is not working. So I wanted to know if there is a solution to this because the answers I saw involved being in the login screen.