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How do I fix the blue line on my imac?
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears. Hold the keys down until the computer restarts and you hear the startup sound for the second time. Release the keys.
Why is there a blue line on my Mac screen?
In case the lines appear on the external display, it means that the issue is caused by your graphics card. If lines appear on your MacBook screen, the issue is most likely related to your hardware, so it would be best to contact Apple’s repair center.
Why is there a blue vertical line on my monitor?
Vertical lines are often caused by a LCD panel electronics failure. The LCD electronic board is located at the display upper side. Without moving the lid try to apply pressure each side of the iSight camera and check if there is a change in the displayed video onscreen.
How do I get rid of the black lines on my Mac screen?
Reset Your System Management Controller (SMC)
- Shut down your MacBook.
- Unplug the power cord and all of its peripherals.
- Wait for 15 seconds.
- Plug the MacBook back into its power cable.
- Wait five more seconds, then press the power to turn your MacBook on.
How do I get rid of the blue line on my screen?
Removing stripes on your screen
- Turn the monitor off and on again.
- Check the cables.
- Adjust the resolution and try a different source.
- Calibrate your screen.
- Adjust the refresh rate.
- Update the video card driver.
Why are there blue lines on my iMac screen?
And did reset every thing back to factory default from HDD formatting and reinstall new OS-X online. Good thing was happened that blue vertical line was totally disappeared. The iMac late 2009 becomes normal. I think that the problem is caused by latest update of OS-X Sierra.
What does it mean when your Mac says blank screen?
A blank screen (black, gray, or blue) should appear once or more during startup. If your Mac appears to be stuck on a blank screen, follow these steps. If your Mac seems to be turned on but nothing appears on your display, determine whether you’re using a Mac with Apple silicon, then follow the appropriate steps:
How do I Turn On my iMac computer?
Turn on the computer. Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears. Hold the keys down until the computer restarts and you hear the startup sound for the second time. Release the keys.