Fixing non responcive keyboards…

Hi, I have 2 keyboards that just don’t work.. One Keyboard, I asked Gateway how to clean my keyboard, it had junk under the keys.. And they gave me instructions to clean it.. I followed it to the Tee.. And now the one keyboard isn’t working at all, it don’t respond when I use it..

The 2nd keyboard just quit working all together..

So how do I fix the keyboards that don’t work anymore? Or are they fixable?