Chosen Solution

Hello, I replaced my battery myself, but now the mag safe charger does not have a light and the battery is not charging. I tried putting in the old battery and it is not charging either. Is there something I may have forgotten to connect? I have reset the SMC several times and am not sure what else to do besides take it in for repairs.

check every single connection, MacBook Pro 15" Retina Display Late 2013 Teardown