Chosen Solution
I just replaced my keyboard, and everything seems to be back in place and working except for the new keyboard. It seems like that’s usually an issue with not putting the connector back all the way– does the image look correct? Is this keyboard just defective?
Even though it may seem correct, it never hurts to unplug and replug the connector. If the problem persists, try cleaning the inside with a toothbrush. There sometimes might be some gunk.