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Level 1

8 points

Macbook Pro Screen blank on startup- External display works only a while- Cant boot up

Hi guys, I have a Macbook pro 13 inch retina with High Sierra. Since yesterday it has just refused to start up: chime, keyboard backlit, however screen turns dark blue (not totally black but nothing is visible). I have plugged in an external monitor, have tried resetting NVRAM, start up disc selection, safe mode, and disk utility. All have failed: apple appears, progress bar reaches around 2/3 of the length then external monitor not connected any more, only the backlit keyboard and the dark blue screen, nothing else... I wonder if any one has encountered the same problem or knows how to fix it. Thanks

MacBook Pro with Retina display, macOS High Sierra (10.13.3)

Posted on Mar 10, 2018 6:48 AM

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seb267 Author

Level 1

8 points

Posted on Mar 11, 2018 3:59 AM

Thanks Allan. The cause turned out to be the loose connector from the in-built screen to the mother board. It was unplugged, plugged in again and voila, the laptop was working again. But I still dont understand why the macbook could not start up with the external monitor.

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Macbook Pro Screen blank on startup- External display works only a while- Cant boot up

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