"MacBook Pro (Early 2015) Retina 13" Display Black Screen with Chime"에 답변Here’s how I got it to work. Few days ago the Macbook Pro 2015 suddenly booted to a blank, dark screen. No light was coming from the screen. But it worked fine connected to an external 4k monitor via HDMI. I reset SMC and PRAM multiple times but that didn’t work. So I opened the back as suggested by iFixit and disconnected and reconnected the battery and the screen connector. The MacBook Pro screen was still not working but now it showed faint light from the screen. Reset the SMC and PRAM once again, no change. Then I connected it to an old Dell LCD monitor with far lower screen resolution than the newer 4k monitor. This time I was using a Mini-DisplayPort to VGA adapter to connect to the Dell monitor. While playing with the scaled resolution setting for the Dell display in macOS preferences, I took it down to the lowest resolution and suddenly the MacBook Pro screen came alive. Disconnected the display and it’s working fine now. Hope this helps someone.