When early 2011 MBP is connected to external monitor, there are some flickering pixels

Discussion in 'MacBook Pro' started by That_Damn_Kid, Mar 15, 2017.

  1. That_Damn_Kid macrumors member

    That_Damn_Kid

    Joined:
    Feb 3, 2017
    #1
    There's several pixels that randomly flicker. It's the external monitor that is doing this. Is it possible the display port is going bad? Or maybe I just need a new cable?

    I tried my Windows laptop and the external monitor didn't have any pixel flickering.
     
  2. keysofanxiety macrumors 604

    keysofanxiety

    Joined:
    Nov 23, 2011
    #2
    If you've got the 15" or 17", they have issues with the graphics failing. So it could possibly be early signs of that.

    If you've got the 13", you can try reset PRAM/SMC, shut down with reopen windows when logging back in disabled and ensure you're on the latest OS. Of course the same advice applies to the 15/17, but with those machines the problem you've describes is leaning towards dGPU failure.

    I assume you used the same cable for your Windows laptop? That would help isolate where the issue is.
     
  3. That_Damn_Kid thread starter macrumors member

    That_Damn_Kid

    Joined:
    Feb 3, 2017
    #3
    It's the 13". I used a VGA cable for my Windows laptop, DVI cable/DVI mini display port cable for my Macbook.
     
  4. vddobrev macrumors regular

    Joined:
    Oct 28, 2016
    Location:
    Haskovo, Bulgaria
    #4
    Based on my experience, this problem may be due to bad cable or bad RAM.
     
  5. keysofanxiety macrumors 604

    keysofanxiety

    Joined:
    Nov 23, 2011
    #5
    Ah OK. Almost certainly the cable then.

    As Vddo said, it could be the RAM as the VRAM is shared with system RAM, so RAM hiccups on iGPU machines occasionally exhibit themselves as odd graphics artefacts. However you'd almost certainly be noticing kernel panics or some other unorthodox problems if that were the case. Providing the RAM fitted in your machine is 1333MHz then I'll double-down on waging it's the cable.
     

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