Thunderbolt vga adapter flickering

i bought a brand new mac mini  a week ago.and i have a display running thorugh the hdmi which workd great. but i recently got the thunderbolt to VGA adapter and i tried to set up a second monitor with it. the vga display is showing up, butits bouncing horizontally on the right side. and every 10 seconds or so will shut off, and turn back on.
it does this on any vga monitor i plug in, even when its the only display i have plugged in. ive tried 4 different vga cables, and still the problem persists.
is this common. and is there anything that can be done to fix it?

I am using a minidisplay port to VGA adopter for my 20102 Mini and have no problem.
Try resetting the NVRAM
How to reset NVRAM on late 2012 Mac Mini: Apple Support Communities
Next try another minidisplay port to VGA adopter.
Last call Apple (you have 90 days or free telephone support) or
- Make an appointment at the Genius Bar of an Apple store.
  Apple Retail Store - Genius Bar

Similar Messages

  • Apple Mini DisplayPort to VGA Adapter flickers

    I have 2 Samsung SyncMaster 23 in, HD Displays connected to my Mac Mini. The Display connected via the Mini DP to VGA adapter flickers erratically. This started happening after installing the latest upgrade of OSX Mountain Lion. I called Apple support, they gave me a list of steps to try to fix the problem, which I followed to the letter, to no avail. The problem is annoying, to say the least. I tried to find out if there was a firmware update for the adapter, but I am running the latest firmware (1.03).
    I would appreciate any help to solve this issue.

    Thank you for your message.
    1. Both monitors only have VGA input.
    2. The other adapter, Mini-DVI to VGA has always worked properly.
    3. The Mini DisplayPort to VGA adapter is an Apple original product I bought at an Apple store. I bought 2 adapters.
    4. Actually I have 2  Mini DisplayPort to VGA adapters: The one I use with my Mac Mini, and another adapter I use to connect my Mac Book Pro to a Panasonic projector.
    5. I have tried using both adapters, and the flickering problem is present using either adapter.
    6. I believe the flickering problem is definitely something that needs to be addressed and solved by Apple. The adapter is its product, and should work as advertised, no matter what version of OSX I am running. Please remember that there was no flickering before I upgraded to the latest OSX Mountain Lion.
    7. I do not believe buying an adapter from another manufacturer, as you suggest, would solve the problem.
    Thank you for your help.

  • How to get screen content onto external VGA screen? Do have thunderbolt-VGA adapter but only get screensaver across

    how to get screen content onto external VGA screen? Do have thunderbolt-VGA adapter but only get screensaver across

    VGA and DVI do not carry sound.  Only HDMI.
    Use a minidisplay-to-HDMI adapter.  Then when the TV is connected to the system use "System Prefences > Sound > Output" to select the TV for sound.
    Or connect speakers to the output port of the MBP.

  • VGA Adapter Flickers or not recognized

    I have an iPad 3 / iPad with Retina Display and have purchased the official VGA adapter. When I connect the screen is mirrored (or extended in Keynote) but the image flickers and the image is not clear at all.
    Is there any way to adjust the resolution or output or configure anything?
    I have tried restarting the iPad with the VGA connected and monitor but then I get a message that this device is not supported and the monitor stays black.
    Thank you

    I have attached this to a 24 inch monitor using iPad 3 6.0.   The screen remains blank.  I have never gotten an image since purchasing the adapter. 
    Does anyone have any answers?

  • Thunderbolt VGA adapter drivers on Windows 7

    I am now using MacBook Pro 13" Early 2011 and I installed windows 7 on it. Everything works fine except the thunderbolt for the secondary display. So, can someone help me give links to the driver? Thanks

    I also have a thunderbolt VGA adaptor for my 13" macbookPRO. Works well connecting to a 19" monitor but not when connected to my Sony TV. My VGA cable works just fine between my PPC mac mini and the Sony TV. Am I missing something?
    Is there some something I have overlooked? I have had a number of Macs over the past many years and almost always find that I am the problem not the equipment.

  • Connection to external display does not work under windows bootcamp, with a thunderbolt to vga adapter.

    Hello guys, after searching a lot in the forum for an answer to this, I could not find a solution so this is the reason for this post.
    I have a Macbook Pro (early 2011 I think) running MacOSX Lion and I have installed Windows 7 64-bit through bootcamp (version 4.0).
    Everything works fine except that I cannot connect my external display through my thunderbolt-vga adapter.
    The external monitor shows only the boot screen of windows (the one with the windows logo) and then, when I get into the login page it goes blank.
    After reading the forum, I have done several things in order to fix this problem such as:
    Restarting the macbook with the thunderbolt device connected to it.
    Updated to the latest ATI drivers through bootcamp.
    Removed the graphics driver and re-install it again.
    I have tried to identify the external monitor through windows 'screen resolution' tool (attached photo).
    but still no luck.
    Does anyone have any idea on what else I could do in order to fix this? By the way, I find it very frustrating that Apple does not have a stable solution to the problem with devices that are connected to the thunderbolt port.
    Thank you in advance

    and here is the attached screenshot

  • Mac Mini and thunderbolt/vga to LCD TV

    Hi All,
    Here is an interesting one......
    I have just taken delivery of 5 new Mac Minis which have the thunderbolt port on them.  The Mac Minis each connect using displayport tb/vga adapter to a switch then on to 5 LCD TVs.
    The HDMI/DVI is not used.
    In this config, if I start a Mac Mini the display will not route through the Thunderbolt/vga adapter to any of the TVs (even though I have selected them on the switch). The display seems to want to go through the default HDMI port.
    If I connect a standard PC monitor to the tb/vga adapter and reboot, the screen shows correctly on the monitor.  If I then change cables without a reboot, the LCD TVs show correctly!
    I can add the PC monitor as a second monitor using HDMI/DVI and ensure that the outputs are mirrored AND that the VGA display is the primary.  However, on reboot it's as if the details are all forgotten!
    Searching around it seems that there are issues with Mac Minis and VGA connections to LCD TVs.  That said, I wanted to put my environment out there and see if anyone had an ideas.
    Interestingly enough, with older Mac Minis (without the tb/vga) it works perfectly well, indicating a problem with the new Mac Minis.
    Thanks for ANY ideas!!!!

    Hey Spost!
    You have explained exactly what happened to me last night.  I was afraid it was part of the 10.8.3 update or the latest ATV software update that hit this week.   I tried from my macbook pro and the airplay from 10.8.3 and the atv software worked fine.  
    Previously my mac mini was connected to a monitor in my basement but last night i made it "headless" and moved it to my "server closet"  airplaying prior to the move worked great ... then last night 4:3 Green Screen. 
    My guess is the computer needs to be connected to a external display in order for airplay resolution to figure itself out.   Via Logmein i could see that the Mirror mode wanted to use the resolution that fit the mac and not what was best for the Apple TV ... Even forcing the change made the setting go right back to this mac. 
    Looks to be a bug in a plist file that apple would need to fix as many people run headless mac mini's and now wish to AirPlay to their Apple TV's without the need for a external cable run. 

  • Thunderbolt-VGA problem

    Hi,
    I have a MacBook Air 2013 and have recently bought a Thunderbolt-VGA Adapter. However when I connect it to the beamer which I use at work (Panasonic), nothing happens - the blue screen projected by the beamer just remains there!
    I have then tried with another adapter from the person which held a presentation there after me and it worked! Therefore my question:
    Are there different VGA Adapters for Macs? When yes could you tell me which one I should buy? Or is my adapter just not working?
    Regards

    It isn't so much different VGA adapters, but some Displayport adapters are not Thunderbolt aware, as Thunderbolt was developed later.   Is there no DVI or HDMI on the Panasonic?  Much higher resolution ranges are possible with DVI, and HDMI also includes the possibility of audio transfer over the same cable.

  • Thunderbolt and MDP to VGA Adapter Compatibility Issue?

    Hi Veterans,
    I know this topic have been asked a lot of times by different people who faced the issue in different way. However, i am unable to find an absolute solution to the problem i am facing currently.
    My question is, can a 3rd party made, Mini Display Port to VGA adapter works on MBP & iMac that have mini display port and not on those that have thunderbolt port??
    I have a 3rd party made, Mini Display Port to VGA adapter that i have tried on 3 apple PC / laptop,
    A MacBook (13-inch, Late 2009) which comes with Mini DispayPort, the adapter work with this laptop.
    A iMac (21.5-inch, Late 2009) which comes with Mini Display Port, the adapter work with this PC too.
    A MacBook Pro (13-inch, Late 2011) which comes with Thunderbolt port, the adapter does not work with this laptop. I have tried many solutions i can find on this forum and none helped.
    The software is fully up-to-date as of 30 April 2013, running Mac OS X 10.7.5 (Lion).
    Tried safe mode, does not helped.
    Tried the boot up when monitor is already switched on procedure, does not helped.
    In all cases, it was tested on the same external monitor. As my MBP was dual-booted using Bootcamp assistant 4.0, i also tried in windows-mode (windows 7) which didn't work too. In windows mode, the screen just keeps flickering while in mac-mode i get a light blue screen. In both cases, the external monitor shows nothing. The external monitor is a Compaq FP7317 monitor with native resolution 1280 x 1024 at 75.0 Hz.
    All these trying have leave me very perplexed. From my research, the thunderbolt port is suppose to accept devices meant for mini display port. So how could an adapter that work on mini display ports, not work on a thunderbolt port? Can any expert enlighten me?

    Problem solved. I picked up the MDP to VGA adapter and was able to use the monitors native res of 1920x1200 but the flicker and wavyness made it impossible to use. And yes the adapter had the current firmware. But what I discovered in the process was that in mirror mode I am unable to drive the monitor at optimum resolution. With that in mind I tried the MDP to HDMI adapter again, unchecking mirror mode, moving the Finder bar to the external display and SHAZAM. I have a rock solid display external display now running at 1920x1200 : )

  • Thunderbolt display: devices not discovered after using Mini DisplayPort–to–VGA adapter

    I have an interested problem related to using my MacBook Air in clamshell (closed) mode, connected to a Thunderbolt display. The problem appears to be related to moving my MacBook air between my office and my home.
    At the office, I use the MacBook Air with an external VGA display, connected via the Mini DisplayPort–to–VGA adapter. At home, I use the MacBook Air together with a Thunderbolt display. An Apple USB keyboard is also connected to the display.
    Mini DisplayPort–to–VGA adapter implicated
    The following sequence of events causes the problem to occur:
    Use the MacBook air (open) together with a VGA display, connected via a Mini DisplayPort–to–VGA adapter (depicted at right);
    Put the MacBook Air to sleep by closing the lid, and disconnect the Mini DisplayPort–to–VGA adapter (I am not sure if the order of these two steps is significant—I usually perform them almost simultaneously when packing up my MacBook Air and getting ready to leave the office); and
    With the MacBook Air still closed, connect it to a Thunderbolt display with a connected USB keyboard.
    At this point, I would expect to be able to wake up the MacBook Air by tapping on the space bar of the keyboard. However, what I have observed is that this does not wake the MacBook Air.
    I can wake the MacBook however by moving or clicking a Bluetooth mouse that is paired with the MacBook Air.
    At this point, although the MacBook Air is awake, and the display is working, the USB keyboard connected to the display still does not work. This is the problem, in a nutshell.
    Unplugging the USB keyboard from the display, and plugging it back in causes the MacBook Air properly to identify the keyboard.
    I used Apple System Profiler to save a list of identified devices at two points in time:
    Immediately after waking the MacBook Air by moving the Bluetooth mouse (at which point the USB keyboard was not working); and
    After unplugging and plugging in again the USB keyboard (at which point the USB keyboard worked fine).
    Many devices are enumerated in the second list that are missing from the first. For example:
    Keyboard Hub@fe110000  <class IOUSBHubDevice, id 0x1000378ef, !registered, !matched, inactive, busy 3 (37993 ms), retain 6>
    AppleUSBHub  <class AppleUSBHub, id 0x1000378f2, !registered, !matched, inactive, busy 1 (37987 ms), retain 6>
    IOUSBInterface@0  <class IOUSBInterface, id 0x1000378f4, !registered, !matched, inactive, busy 1 (37986 ms), retain 6>
    Keyboard Hub@fe110000  <class IOUSBHubDevice, id 0x1000378f6, registered, matched, active, busy 0 (7 ms), retain 10>
    AppleUSBHub  <class AppleUSBHub, id 0x1000378f9, registered, matched, active, busy 0 (1 ms), retain 9>
    IOUSBInterface@0  <class IOUSBInterface, id 0x1000378fb, !registered, !matched, active, busy 0, retain 7>
    Apple Keyboard@fe112000  <class IOUSBDevice, id 0x1000378fd, registered, matched, active, busy 0 (112 ms), retain 11>
    and many child devices…
    Using the Mini DisplayPort–to–VGA adapter appears to be a necessary step to causing this problem to occur. If I merely disconnect the MacBook Air from the display, let it go to sleep, and then reconnect it again, the USB keyboard will work immediately and can be used to wake the computer from sleep.
    Some devices are discovered even when the computer is in sleep mode. This is how it should work.
    The problem appears to be that when a Mini DisplayPort–to–VGA adapter has been used since the last time the computer was connected to a Thunderbolt display, the MacBook air does not discover devices completely when it is again connected to the Thunderbolt display while in sleep mode.
    Can anyone else reproduce this problem?

    Hi glraczon.support,
    It sounds like the external display you are using (projector) operates at a smaller resolution than your MacBook Pro. You may want to configure the display preferences in System Preferences for the external projector.
    Here is an article that may help you with that process:
    OS X Mountain Lion: About the Display pane of System Preferences
    http://support.apple.com/kb/HT5369
    Thanks,
    Matt M.

  • I have a MBPro mid 2013 with 1 Thunderbolt port. Just bought a Mac monitor and want to daisy chain a PC monitor to it. Use a Mini DVI to VGA adapter from MBP to PC monitor. How do I daisy chain the 2 monitors?

    I have a MBPro mid 2013 with 1 Thunderbolt port. Just bought a Mac monitor and want to daisy chain a PC monitor to it. Use a Mini DVI to VGA adapter from MBP to PC monitor. How do I daisy chain the 2 monitors?

    Hall Palm Desert,
    if your Mac monitor has Thunderbolt ports, and the PC monitor is on the end of the daisy chain, then you might be able to do it by connecting your PC monitor’s VGA cable to a Mini DisplayPort-to-VGA adapter (e.g. Apple, NewerTech), connecting that cable’s Mini DisplayPort end to one of the Mac monitor’s Thunderbolt ports, and then connecting a Thunderbolt cable between the other port on the Mac monitor and your MacBook Pro.

  • Mini-DisplayPort to VGA adapter & other thunderbolt devices

    I currently use the mini-DisplayPort to VGA adapter so that I can work on a large external vga monitor.
    Will this work if the adapter terminates the chain or will I need to connect the adapter directly to the laptop thus preventing me from using any thunderbolt devices?

    I was just thinking.. It is possible that belkin is support the miniDisplay in that port as well.
    Yeah, that was my thinking as well...
    The matrox dock is going to have DVI on it, but it doesn't support chaining (i.e. it only has 1 TB port)
    Does your external monitor support DVI - let me go look at the Matrox - ugh - don't like it compared to the Belkin.
    They're BOTH expensive and, as I don't believe that either is shipping, I'd have to wait on someone else to do the beta testing.
    I've never tried a USB>DVI adapter - here are a few from my favorite adapter/cable company, though.
    Good luck,
    Clinton

  • HT3382 With a MacbookAir (mid-2012) using a mini DisplayPort to VGA adapter plugged into the Thunderbolt port, can you configure the external monitor to FULLY display in portrait mode yet keep the built-in display in landscape mode?

    With an 11"-inch Macbook Air (mid-2012) using a mini DisplayPort-to-VGA adapter plugged into the Thunderbolt port:
    Can you configure an extended desktop with an external monitor (20") displaying full portrait mode (1200 x 1600 resolution) and keep the built-in display in landscape?
    I'd like to see something like
    External monitor / Built-in display

    Yes, I can't see why not.
    Just give it a try and report back if you have a problem.

  • HT3492 What do I need to do to use the iMac as a monitor from my HP laptop? I have my HP connected to the Mini DisplayPort to VGA adapter which is plugged into a Thunderbolt port.

    What do I need to do to use the iMac as a monitor form my HP laptop?  I have my laptop connected to the Mini DisplayPort to VGA adapter which is plugged into a Thunderbolt port.

    vga may not be a compatible port
    https://discussions.apple.com/thread/2246912?start=0&tstart=0
    more hits
    https://www.google.dk/search?source=ig&hl=da&rlz=1G1TSEH_ENDK367&q=use+imac+as+m onitor+for+pc&oq=use+imac+as+mon&gs_l=igoogle.3.0.0l10.2417776.2420497.0.2421354 .15.11.0.2.2.0.316.1723.0j4j3j1.8.0...0.0...1ac.-OkFwmTKBg0

  • Thunderbolt port is heat/hot with VGA Adapter - Led TV

    Hello guys
    I have a MacBook Pro 13 inch, not retina display.
    I bought almost 1.5 year ago the VGA adapter, it works through the Thunderbolt port.
    I used to work with a monitor of 15.6 inch, how a secondary screen to watch webinars, video, programming etc...
    Just some weeks ago I bought a Led TV 42 inch
    I did realise that after some hours, 2-4 the left part of the Mac, where the thunderbold port is located, is heat/hot, more than the ususal, this behavior never happened with the previous small monitor..
    It is normal? The fan do not emit a special sound indicating they are working...it is always quite silent since the first day I bought the Mac..
    I remember a day when I did an upgrade of the OSX from 10.8.4 to 10.8.5 that when the Mac has restarted the fan did a strong sound how indicating or testing themselves
    What I should do?. Should I ignore the heat or I should work with this software smcFanControl, popular according with Google when I did a research to let me change explicitly the fan speed.
    Thanks in advance by your support.

    How hot is hot?  Install istat menus:
    http://bjango.com/mac/istatmenus/
    When your MBP gets hot, open the application and take a screen shot of the temperatures and fan speeds.  Post for inspection.
    Ciao.

Maybe you are looking for