Tips provided by DL Byron.
discussions.apple.com/message/19289069?ac_cid=tw123456#19289069?ac_cid=tw123456
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Add another LG display to the list of replaced in week 26. Confirmed the issue and my local Apple Store replaced it. Also, found another, easier way to discover a related issue.
Boot into recovery partition
Grab and move a window around
If the screen tears or the corners of the window blur, you've got an affected MBPr.
Why the ghosting and tearing of windows in the recovery partion are linked, don't know, but that's what happened on my unit. I tested the new unit in the store and no tearing or blurring of windows in the recovery partition.
Also, been through 10 MBPs in the past 2 years, 3 of them defective. You're likely more informed than the Genius and let them take you through their process.
They can't argue with what looks like video card issues combined with the ghosting IR.
Message was edited by: DL Byron