Chosen Solution

Hi all, After I changed my battery I read it was needed to run a NVRAM and SMC. Well I did that and after running NVRAM my laptop started blinking, but so much that is impossible to do anything. Does anyone know how to fix it? Here is the video of it: https://youtu.be/1MHCxDQ2uOw Thanks

Did you let the system charge the battery up? What does the onboard battery checker tell you? What is the color of the MagSafe charger LED Amber or Green?

Did you do anything else like take the logic board out so you could clean the dust out? Did you use a small brush to scrub things down and then use vacuum or did you use a can of can’ed air to blow the debris out? You did something else here which messed you up. The swap out of the battery shouldn’t have don’t anything.