Complete beginner and need some help. I bought a new battery for my MB pro mid 2015. And I followed the guide to the tee. When I went to open it back up I heard the chime. It gave me a very brief screen like it was on but the screen was still black. To clarify the screen was “lit” but the screen was black only for a brief second. The fans kick on high for a couple of minutes but no display. Any guess as to what I screwed up? The charger cable has the green dot so idk if it’s the battery. I went back and double checked every cable was perfectly in place but is there a specific one that handles the display?