
It turns out that there is a known issue with early 2011 Macbook Pro's displays and that Apple is going to replace the logic board for free. Macbook pro checkered display, safeboot works I would love this to be a purely software issue that I can fix by reloading El Capitan, but I am afraid the problem will be related to this question

At other times I am forced to power off blindly and at those times it can take 2 or 3 hard reboots to clear the issue an get to a working login screen. Sometimes (if I am lucky) I can still see a mouse pointer and shutting down safari clears the issue. Click on an random link in Safari (especially one with images, or google maps) But not all the time as I am posting here on the system in question.There have been different triggers for this behavior such as Totally "Blue" screen (with alternate lines of differing blue).The screen issues manifest themselves in several different ways: I didn't apply any updates just prior to the issue, so I can only assume that something has changed for the worst.

In the last week I started seeing a serious issue with the display on my Macbook Pro (Early 2011, El Capitan) where the screen has gone "crazy".
