Vertical blue lines over black screen at startup and lockscreen

Discussion in 'iMac' started by Jara2212, Aug 19, 2017.

  1. Jara2212 macrumors newbie

    Jara2212

    Joined:
    Aug 19, 2017
    #1
    Hello, a few days ago I locked my imac screen and got a black screen with blue lines instead of the lock screen where I usually write my password (pic #2). The only solution I found was to restart the computer but, everytime, it starts up with a similar glitch screen (pic #5), sometime if I'm lucky (1 out of 5 times restarting) it starts up with the same glitch screen but then it displays my user logo behind the blue lines so I can put my password and everything looks normal again (pic #4), but if I lock my screen again (cmd+shift+eject) I would get the same glitch screen as when I restart it. I couldn't find any solution, please help. Thanks.
    [​IMG]
     
  2. SaSaSushi macrumors 68040

    SaSaSushi

    Joined:
    Aug 8, 2007
    Location:
    Takamatsu, Japan
    #2
    Vertical lines are an almost certain sign of a failing video card. Unfortunately, if so there are no easy or inexpensive fixes.

    What year and model is it?
     
  3. Jara2212 thread starter macrumors newbie

    Jara2212

    Joined:
    Aug 19, 2017
    #3
    27-inch, Late 2013
     
  4. SaSaSushi macrumors 68040

    SaSaSushi

    Joined:
    Aug 8, 2007
    Location:
    Takamatsu, Japan
    #4
    My best guess is either a failing GPU or an LCD panel gone bad. If the machine is not freezing, crashing, rebooting, more likely the latter. Either one is a very expensive repair.

    I take it the machine doesn't have AppleCare? Do you only get the vertical lines at the login screen? No glitches while in use?
     
  5. Huddy macrumors member

    Joined:
    Oct 9, 2009
    #5
    As SaSaShushi states it's either a dying GPU or LCD failure. Without AppleCare that's going to be a very expensive repair sadly.
     
  6. jacklivehere macrumors member

    Joined:
    Oct 9, 2014
    #6
    I had similar issue on my iMac 5k 2014 i7 model. but only during startup. not on lock screen. It turned out to be Beta version of MacOS. Once I reinstalled without beta, every thing went back to normal.
     
  7. vyokyong macrumors newbie

    vyokyong

    Joined:
    Aug 16, 2017
    #7
    My iMac late 2009 had blue vertical line on screen and I thought that its VDO card had problem. I did back up with time machine. 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. Then I set my iMac late 2009 does not to automatically update OS-X in order to avoid this problem again.
     
  8. littlehb macrumors newbie

    Joined:
    Dec 11, 2017
    #8
    Did you find a solution to this? I am having the same problem with my late 2013 27"iMac.
     
  9. Del Rei macrumors newbie

    Joined:
    Dec 13, 2017
    #9
    Today my 21” iMac late 2013 got the same problem. Vertical blue lines on start up and nothing happens. No start up. It’s completely dead.

    Any ideas?
     
  10. Del Rei macrumors newbie

    Joined:
    Dec 13, 2017
    #10
    Just to help someone in future...
    Got mine today at assistance today. That was a LCD problem. I had to buy a new LCD to replace it.

    Thats not a video card or logic board problem.
     

Share This Page