External Monitor puzzle

Discussion in 'MacBook Pro' started by dotme, Jan 15, 2014.

  1. dotme macrumors 6502a

    Oct 18, 2011
    I'm stumped on this and hoping someone has a tip. Bought two mini displayport to DVI adapters and cables for two macbook pro 13" mid 2012 laptops. So I have two of everything to be able to swap adapters, cables, even macbooks.

    Can't get it working. The macs "see" the external monitor when I go into Displays, and will let me drag it around in the "Arrangement" tab.

    But the external monitors both say "No Signal" on DVI input.

    Running Mavericks.

    Any tips? Did I buy the wrong adapters? Any help appreciated!
  2. alphaod macrumors Core


    Feb 9, 2008
    What kind adapters did you buy, what monitor do you have, and which Macs do you have?
  3. dotme thread starter macrumors 6502a

    Oct 18, 2011
    http://www.amazon.com/gp/product/B007KB0EGC x2 (I read the reviews, thought I was safe)

    http://www.amazon.com/AOC-E2243FW-21-5-Inch-LED-Monitor/dp/B0046U0FSM/ x2 (Now discontinued, I believe)

    Late 2012 cMBPs 2.5GHz dual-core Intel Core i5 models x2

    http://www.amazon.com/gp/product/B000O5TH14 x2

    I'll be honest - this is a minefield to me. I want the best signal I can get (I have newer monitors on the way) and clearly something from the list above isn't playing nicely. Things would probably have gone a lot better if I knew what the heck I was doing ;)

    Swapped so much equipment around tonight that I'm pretty sure I don't have a "factory bad" item, so there must be some incompatibility in play. Just don't know what.
  4. dotme thread starter macrumors 6502a

    Oct 18, 2011
    Well, just a follow up. Came home with geniune Apple adapters this morning, replaced the Bluerigger adapters, and it works. Can't decide if I got two "bad" adapters, or if they just aren't compatible with the 2012 MBPs but either way, I think I got taken for a bit of a ride. Not worth expending additional time and effort returning them though, so they'll be tossed. Lesson learned.

    Thanks for responding :)
  5. ecschwarz macrumors 65816


    Jun 28, 2010
    It may be your adapters - the 2012 13" MBP had some issues with some third-party adapters. I've bought a lot of things from Monoprice over the years, but their VGA adapter would cause my computer to hard freeze. That same adapter works fine on an iMac and the official Apple one works fine for my computer. I haven't had issues with Monoprice's DVI or HDMI adapters though, so it may be specific to what third-party manufacturer and their methods.

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