Weird pixels on start up screen

I did a DIY ram upgrade from 4g to 16g on MacBook Pro 17" (mid 2012 model). Everything is fine, but I now get a weird little block of pixels on the grey start up screen. It lasts 2 seconds, and goes away, but otherwise seems ok. Could this be symptomatic of some other issue? Just kind of concerns me when there's some little glitch like, even if it's benign.
Belowe is a screen shot. This shows up just after the Apple Logo screen on start up.

Early 2011 Model
MacBook Pro (15-inch, Mid 2010): Intermittent black screen or loss of video.  Affected computers were manufactured between April 2010 and February 2011.
Worth a call to Apple Care to determine if you qualify for a free repair.  Especially if you do not have Apple Care Protection Plan.
P.S.  Just saw that you have the 17".  I would still call.

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