iMac intermittent screen corruption

Discussion in 'iMac' started by Richdmoore, Oct 25, 2017.

  1. Richdmoore macrumors 68000

    Richdmoore

    Joined:
    Jul 24, 2007
    Location:
    Troutdale, OR
    #1
    I just posted a similar thread on the high sierra board, but I though I would post here to and see if anyone has seen this issue with their 2011 iMac (21.5").

     
  2. surjer macrumors newbie

    Joined:
    Oct 24, 2017
    #2
    Start backing up now! That has happened to two that I know of, the graphics card going bad... It only gets worse until it just fails all together. .
     
  3. Richdmoore thread starter macrumors 68000

    Richdmoore

    Joined:
    Jul 24, 2007
    Location:
    Troutdale, OR
    #3
    Thanks. I am running two time machine backup drives (one usb & one time capsule. I was also making super duper backups, but since the switch to High Sierra I wasn't sure how safe it would be to clone to a hdd.

    I am still hopeful it is a High Sierra bug, but preparing in case it is not.
     
  4. verdejt macrumors 6502

    verdejt

    Joined:
    Jul 19, 2011
    Location:
    Central Florida
    #4
    Not a High Sierra bug. I have a mid 2010 27" iMac and my machine does this all the time. Including kernal panics and lock ups for no reason. Over the Thanksgiving break I'm going to try and get mine fixed. I don't have the money for a new iMac so I'm going to fix mine. Seems to be a common problem with the 2010/2011 iMacs.
     
  5. Richdmoore thread starter macrumors 68000

    Richdmoore

    Joined:
    Jul 24, 2007
    Location:
    Troutdale, OR
    #5
    Well, I loaded the update to High Sierra, and am still getting intermittent graphics corruption. I am positive it is the hardware that is giving out.

    The question now is should I take the iMac to apple (it is almost vintage, and will be classified as such any day), order a used replacement ($300+ when I looked) to install myself, or simply cut my losses and start looking for a new computer?

    I have a copy of apple's hardware diagnostic test that I acquired, and it shows the graphics card as ok, so I am not sure if I would be wasting my time or not taking it into apple.

    In addition to the failing graphics, the dvd drive has been inop for a few years. I currently use a USB bluray drive instead.

    Right now the computer is still operable (with minor graphics issues) so I may be able to nurse this until the iMac/macbook pro/mac mini receive the next updates.

    I am torn on what model computer to replace the iMac with as well.
     
  6. Samuelsan2001 macrumors 604

    Joined:
    Oct 24, 2013
    #6
    I wouldn’t spend any money on a 6 year old pc myself it’s false economy, i’d get a new machine and sell the old one for parts.
     
  7. Hater macrumors 6502a

    Hater

    Joined:
    Sep 20, 2017
    Location:
    Edinburgh, Scotland
    #7
    Yep my G5 did exactly that. 2 weeks later entire display was corrupted. Graphics card was kaput.

    Way to test is connect an external monitor, if it still does it then it's the graphics card, if it doesn't it's the connection to the screen.
     
  8. Richdmoore thread starter macrumors 68000

    Richdmoore

    Joined:
    Jul 24, 2007
    Location:
    Troutdale, OR
    #8
    I was able to test it on a 720p tv today, still had the weird squares on both displays. I'm pretty sure the graphics card is dying.

    I was hoping to be able to pass the iMac on to other family members, but not if it has this issue. Now I need to hope that the computer lasts a bit longer to see if a Mac mini update, MacBook update, or iMac update occurs before this computer stops working completely.
     

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7 October 25, 2017