修复你的物品 社区 商店

2.2 GHz (Turbo Boost up to 3.4 GHz) or 2.5 GHz (Turbo Boost up to 3.7 GHz) quad-core Intel Core i7 processor with 6MB shared L3 cache.

465 个问题 查看全部

更多选项

MacBookPro only boots when an external screen is connected

My friends MacBook Pro 15" 2014 shows some pretty weird behavior.

When booting up the process suddenly stops and and a black bar appears on the upper part of the screen. Then nothing happens anymore.

I tried to find out if it was a graphics problem and connected it to a screen over the Thunderbolt port. It booted up normally and i can even disconnect the screen and work normally. It even works when i only have the VGA-Thunderbolt adapter connected without the screen. (For DVI and HDMI the cable/adapter isn’t enough, there needs to be a screen attached, guess that’s a digital/analog thing)

He had NVIDIA CUDA installed and i removed all that because apparently that isn't supported in Mojave anyway. This didn't change anything though.

Does anyone know what might be going on here?

Thanks!

回答此问题 我也有这个问题

这是一个好问题吗？

是 否
得分 0
添加一条评论

2个答案

筛选条件:
最有帮助的 最新 最老的
最有帮助的答案

更多选项

Carefully examine the display for any impact anomalies. It can even be the size of a pinprick.

Does it look kind of like this?

Block Image

这个答案有帮助吗？

是 否
得分 2

2条评论:

No nothing like this. It's a straight line about 2cm wide from left to right and it only appears after it booted about 2/3. The fact that it works when i plug in the VGA adapter makes me think it's not an issue with screen itself.

由完成的

Please post a photo of what you are seeing as this is a very unusual problem.

由完成的

添加一条评论

更多选项

To be on the safe side first do a PRAM reset and an SMC reset. If this doesn’t work are you able to boot into network recovery on the internal display? This will rule out a software issue.

See this guide on booting into network recovery: https://support.apple.com/en-gb/HT204904

这个答案有帮助吗？

是 否
得分 0

5条评论:

Thanks. I forgot to mention, did both of that and tried to boot from an external drive. From the external drive it's not a black bar but a thin fuzzy line which looks a lot like graphic errors.

由完成的

In that case try running Hardware Diagnostics: https://support.apple.com/en-gb/HT202731 plug in the external monitor if you can't see anything in the diagnostics.

由完成的

I just did a safe boot and that booted normally. I thought i had tried that already...

So could it still be some remnants of the CUDA stuff?

Hardware Diagnostics didn't find anything.

由完成的

it could be, Maybe do a reinstall just to be sure its gone.

由完成的

is it definitely a 2014? it might fall under this program : https://www.apple.com/support/macbookpro...

由完成的

添加一条评论

添加你的答案

DocM 将永远感激不已
浏览统计数据:

过去 24 小时： 0

过去 7 天： 1

过去 30 天： 3

总计 268