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Sometimes when I open the lid of my Retina Macbook Pro, there is a horizontal black line which looks to me as if they're dead pixels. They'll go away after I open any app and only happens when the lid has been closed for a few hours. What's causing this?
MacBook Pro (Retina, 13-inch, Late 2013), OS X Mavericks (10.9.1)
Hey there kevkear,
It sounds like you are seeing a line of black pixels on your screen after it has been asleep and closed for a bit. I would use the troubleshooting from the following article named:
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/ht1573
These steps in particular:
Reset the system
You can reset the Mac's parameter RAM and SMC.
Reset the resolution
Start by resetting the Mac's parameter RAM. If the display does not come up, was previously set to an unsupported resolution, and still results in no video:
- Start up in Safe Mode.
- From the Apple () menu, choose System Preferences.
- Choose Displaysfrom the View menu to open the preferences pane.
- Select any resolution and refresh rate that your display supports.
- Restart your computer.
Thank you for using Apple Support Communities.
All the very best,
Sterling
Hey there kevkear,
It sounds like you are seeing a line of black pixels on your screen after it has been asleep and closed for a bit. I would use the troubleshooting from the following article named:
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/ht1573
These steps in particular:
Reset the system
You can reset the Mac's parameter RAM and SMC.
Reset the resolution
Start by resetting the Mac's parameter RAM. If the display does not come up, was previously set to an unsupported resolution, and still results in no video:
- Start up in Safe Mode.
- From the Apple () menu, choose System Preferences.
- Choose Displaysfrom the View menu to open the preferences pane.
- Select any resolution and refresh rate that your display supports.
- Restart your computer.
Thank you for using Apple Support Communities.
All the very best,
Sterling
A line of pixels go black across screen?
