Chosen Solution
I have replaced my macbook pro 13" 2014 battery but ended up losing some keyboard functions: 1qaz, backspace dim, brightness and volume down. Have i damaged the circuit or something since 1qaz are in a row? I have used the input keyboard in systems preference and can see that when i click on these keyboard buttons i have mentioned that they are not recognised by my laptop.
Sorry you may have to open her up and recheck all the connectors you removed and reassembled. fairly forgiving as far as errors as long as they were not damaged.
