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What causes horizontal lines on MacBook screen?
The MacBook Pro screen starts to develop grey or black horizontal lines from the bottom edge (sometimes the top), typically 1-2 cm “tall”. This band of lines is often flickering/strobing. The issue usually occurs when the laptop is used intensively for long hours. It gradually increases with time.
How do I fix the horizontal lines on my MacBook Pro screen?
Press and hold the Command, Option, P, R keys. Press these keys simultaneously before the grey screen appears. Hold down those keys until your MacBook restarts, and you hear the startup chime the second time. Finally, release the keys.
What causes GREY screen on MacBook Pro?
Causes of the Gray Screen Startup Problem Sometimes, a bad peripheral or its cable causes one of the signaling pins on one of Mac’s ports to get stuck in one condition (set high, set low, or shorted out to ground or positive voltage). Any of these conditions can cause your Mac to freeze during the startup process.
How do I fix GREY screen on startup Mac?
(If it’s not responsive because it’s stuck on a gray, blue, or white screen, just hold down the Mac’s power button for several long seconds until it gives up and shuts off.) Hold down the Command and R keys, and power the Mac back up again. Eventually, you’ll end up on a screen headlined OS X Utilities.
What is gray screen of death?
What Are gray Screens of Death? When a gray Screen of Death occurs, your computer goes blank, without display. This issue is quite rare and normally happens during startup, but it can spring up while the PC is in use.
What does a GREY screen on my computer mean?
Monitors malfunction for numerous reasons. When a monitor turns grey, it might indicate an incorrectly connected display cable or a faulty graphics card. Several interactions from the computer to the monitor take place to display a single image—and any one of these interactions could be faulty.
Why does my MacBook Pro have a gray screen?
A dead logic-board battery in a Mac Pro can cause a gray screen at boot. Typically the boot failure will be preceded by loss of the startup disk and system clock settings. See the user manual for replacement instructions.
Can a MacBook Pro boot with a green apple logo?
Make a “Genius” appointment at an Apple Store to have the machine tested. My late 2011 macbook with 10.11.2 crashed and I got a Green apple at startup, then it would reboot by itself , and again, and again, tried step #4 resetting the NVRAM. and it work for me, It took time to boot the first time but its working like before, thank you !! Linc Davis
Why does my MacBook Pro MBP not boot?
Suddenly my MBP won’t boot and horizontal lines appear at apple logo and than freezes with white screen. When I try to wait, my MBP starting to get hot and the fan speed is increasing. I already try the safe mode but it freezes again with blue screen and vertical lines.
Why is the Apple logo on my MacBook Pro?
It starts up with the green apple logo, and then goes to a blank white screen. Any ideas/suggestions? Just updated to 10.8.4 but not sure that’s the cause.