Replaced battery but MacBook wont boot

I recently replaced the battery on my 2015 Retina MacBook. Everything seemed to be working well. I replaced the battery, it booted up. I charged the battery to full, and then let the battery run down. Once I got to work, I planned on pugging it in to charge it back up. I plugged it in, but now it wont boot at all. For a few minutes a battery icon would flash. But now that wont even come up. It’s just a dead, black screen. Power button not doesnt work.