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MacBook Pro screen display stays black but works on external monitor.

My MacBook Pro makes the normal power-on noise when it boots up but the display stays black. If I flash a light through the apple logo I can see the login page and after I log in the screen will display to an external desktop monitor I have hooked up through the HDMI port.

I tried opening up the MacBook and performing steps 1-6 and 11 of the guide below thinking it might be a loose connection with the cable in step 11 but it did not fix the problem.

MacBook Pro（13英寸，带有Retina显示屏，2013年末）显示屏组件更换

I also tried steps 16-18 of the guide below as I saw a youtube video where someone fixed this issue by simply detaching and reattaching this cable (in addition to the aforementioned cable), but again it did not fix the problem.

交换MacBook Pro 13'' Retina显示器2013末期版本的主板

I also ran an Apple Diagnostics test and it said there were no issues identified.

Any other ideas before I have to bring it in to a shop to get fixed?

I greatly appreciate the help, thanks!!

MacBook Pro 13" Retina Display Late 2013 显示屏组件图片

指南

MacBook Pro（13英寸，带有Retina显示屏，2013年末）显示屏组件更换

难度：

中等

—

30 minutes - 1 hour
MacBook Pro 13" Retina Display Late 2013 主板图片

指南

交换MacBook Pro 13'' Retina显示器2013末期版本的主板

难度：

中等

—

1 - 2 hours
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Have you uses it with an external monitor lately?

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It’s a back-light circuit problem, you’ll need to take it to someone reputable locally that does Mac-book board repairs to fix it.

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Is there anyway to test this theory before bringing it in?

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With these models this can sometimes be caused by either a faulty LCD Cable or a faulty LCD. It runs from the LCD to the Logic board. I would recommend if you can and have the knowledge to replace it yourself or take it to a reputable repair shop for help with it. This sounds to be a hardware issue more so than a software issue unfortunatly

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The LVDS cable?

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@austinkn - Haven't seen a bad cable as the issue directly. Have seen liquid damage on the logic boards LVDS connector and the cable connector getting damaged as well on a fair number of systems. Checkout Step 11 in this guide MacBook Pro（13英寸，带有Retina显示屏，2013年末）显示屏组件更换

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Try reset the P-RAM 3 Times, totally off de Mac press Option + Command +P +R and press de Power Button.

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Why do you think you need to do this more than once?

Reset NVRAM or PRAM on your Mac

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@danj Repetita iuvant ? :D

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I tried this first multiple times before and it didn’t work so I thought it was probably a hardware issue

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