2 Replies Latest reply: Jan 14, 2014 9:42 AM by Ranjoharbri
Ranjoharbri Level 1 Level 1 (0 points)

Today I noticed that light coloured grey and white vertical 'Pinstripe' lines have appeared on the monitor of my Mid 2010 27 in iMac.
I have carried out a repair permissions through the disc utility, and attempted to run AHT from the original install disc.
As my superdrive no longer allows me to read DVD's I'm really stuck as to what could be causing these lines to appear.


Coupled to this the dreaded smudge marks that have reappeared on my monitor (even though it was replaced by Apple less than 3 months ago), I am now seriously considering throwing this machine away and buying a P.C.


Not to throw the baby out with the bathwater (so to speak). Does anyone on the forum have any idea how I can get rid of these annoying pinstripe lines. Is there a fix I don't know about.
Many thanks - A very disgruntled and about to become ex Apple iMac owner.

iMac (27-inch Mid 2010), OS X Mavericks (10.9.1)
  • rkaufmann87 Level 8 Level 8 (47,060 points)

    You will either need to get the Superdrive repaired or replaced in order to run AHT.  You can get an external USB powered DVD drive and run AHT from that if you want. When you are able to run AHT run it in extended mode at least 2-3 times back to back. If any errors appear that means it has had a hardware failure. If no errors appear that only means the machine needs more robust testing, something the end user cannot do. You will need to take the machine to an Apple Store or AASP to be professionally diagnosed.


    However I suspect your machine may be suffering from a failing graphics card. 

  • Ranjoharbri Level 1 Level 1 (0 points)

    Many thanks rkaufmann87.
    I'm so sick of the problems I've had with this machine, I'm going to scrap it I think.
    It's been back and fore to Apple so many times for different repairs it's cost me more money than it's worth.