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philippe217 Level 1 (0 points)

Hello

 

I bought 2 new Macbook Pro 13' , 2.9 Ghz Intel Core i7, with 8 Go 1600Mhz DDR3,  Intel HD Graphics 4000 512 MB, Mac OS X Lion 10.7.4 (11E2617).

 

I have connected a Mini DisplayPort to VGA Adapter in order to show presentations on different LCD projectors but  no image appear.

 

The external monitor is detected but no image is shown. I have tried to change the frequencies: parts of the screen appears but no a correct image. I have the same symptoms with the 2 Macbook Pro. Using old Macbook Pro with the same Mini DisplayPort to VGA Adapter, the slides are showns normally.

 

I make a test with a Mini DisplayPort to DVI Adapter and with a Mini DisplayPort to HDMI Adapter and everythings works correctly with both adapters.

 

Does anybody has a solution?

 

Thank in advance for your help

 

Philippe


MacBook Pro, Mac OS X (10.7.4)
  • Scyanide Level 1 (30 points)

    By any chance were you using a VGA->DVI adapter when trying to use the Mini-DisplayPort->VGA adapter? As in Mini-DisplayPort->VGA->DVI?

     

    I had trouble with this. I found going straight to Mini-DisplayPort->VGA or Mini-DisplayPort->DVI worked perfectly but once I added a VGA->DVI or DVI->VGA adapter to the chain the screen would be detected by OS X but the monitor itself would give the "No signal detected" message. I tried all these combinations on the same monitor.

     

    Not sure if it helps your situation but I have noticed some similar issues.

     

    EDIT: Oh, and I have the new MacBook Pro 15inch with Retina all fully updated. I noticed that with my late-2009 White Macbook didn't have this issue with the cables and adapters.

  • philippe217 Level 1 (0 points)

    Thanks but I work straight Mini DisplayPort to VGA Adapter and it is not working

    Mini DisplayPort to DVI Adapter and with a Mini DisplayPort to HDMI Adapter works fine

     

    best regards

  • NoTtSuKe Level 1 (0 points)

    I also have this problem. But my Mac is Macbook Air 2012 13' with Intel HD Graphics 4000.

  • Shootist007 Level 6 (16,660 points)

    Is the adapter you are using an Apple adapter or some other brand? I had problems with another brand and when I switched to the Apple brand the problem went away.

  • nmartinscampos Level 1 (0 points)

    same here. new mba 13". tried with two projectors and didnt work. seems a problem with the refresh rate...

  • Csound1 Level 8 (46,900 points)

    nmartinscampos wrote:

     

    same here. new mba 13". tried with two projectors and didnt work. seems a problem with the refresh rate...

    And what refresh rate does your projector require?

  • NoTtSuKe Level 1 (0 points)

    Hi my problem was fixed after update the driver from

     

    http://support.apple.com/kb/DL1551

     

    Hope your problem will fix.

     

    Thank

  • khoyland Level 1 (0 points)

    Do you of a driver for MacBook Pro? The above link was for MacBook Air. I am having the same exact problem.

  • joshuacuk Level 2 (190 points)

    Here's the update that might fix it for mid 2012 MacBook Pros:

     

    http://support.apple.com/kb/DL1542

  • khoyland Level 1 (0 points)

    That update fixed the issue on my 2012 MacBook Pro. Thanks.

  • abusch38 Level 1 (0 points)

    I have a new 2012 (June) MacBookPro running 10.7.4 with a 2.5 GHz Intel i5 processor. Graphics  Intel HD Graphics 4000 512 MB.

     

    I'm trying to connect a Toshiba flat screen TV to the computer via a mini display port to VGA adapter purchased from  Apple with the computer. I can get the screen to show on the TV by changing resolutions and refresh rates (1280 x 768 at 60Hz) but the TV shows 5 partial screens on my laptop screen. I feel like I'm looking at the beginnings of an abstract art piece.

     

    All software is up to date.

     

    Any advice would be appreciated.

  • Csound1 Level 8 (46,900 points)

    abusch38 wrote:

     

    I have a new 2012 (June) MacBookPro running 10.7.4 with a 2.5 GHz Intel i5 processor. Graphics  Intel HD Graphics 4000 512 MB.

     

    I'm trying to connect a Toshiba flat screen TV to the computer via a mini display port to VGA adapter purchased from  Apple with the computer. I can get the screen to show on the TV by changing resolutions and refresh rates (1280 x 768 at 60Hz) but the TV shows 5 partial screens on my laptop screen. I feel like I'm looking at the beginnings of an abstract art piece.

     

    All software is up to date.

     

    Any advice would be appreciated.

    Use HDMI (if your TV has it) or DVI, not VGA.

  • abusch38 Level 1 (0 points)

    Csound1,

    Thanks for the reply. However, I'm having the same issue with my digital projector at work (which only uses VGA). I'd prefer to not buy multiple adapters that may or may not work when the one I have from apple does not work. Granted, most likely this is a bug in OS X 10.7.4, but the patches I've downloaded have done nothing to fix the problem.

  • abusch38 Level 1 (0 points)

    Called Apple Support and they solved my issue.

     

    1) Restart the computer in Safe Mode with display attached (shut down and restart while holding down shift key).

         The display showed up without distortion.

     

    2) Change the display to my desired preferences (dimensions and refresh rate).

     

    3) Restart computer. ...and it works like a charm.

     

    Vioala!

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