24inch iMac with Mini-Dvi to VGA adapter, is not working correctly!

OK, I PLUGGED MY ADAPTER TO THE VGA CABLE FROM THE OPTOMA PROJECTOR AND THEN CONNECTED THE ADAPTER TO THE 24IN IMAC. I USED THE REMOTE FOR THE PROJECTOR AND SELECTED VGA 19(WHAT PORT COMPUTER IS CONNECTED TO) AND ALL I SEE IS MY WALLPAPER, NOT ONLY THAT, IT IS PURPLE! I REALLY NEED HELP? I HAVE TOYED WITH IT A LITTLE BIT AND GOT IT TO WHERE IT SHOWS MY ENTIRE SCREEN, BUT IT IS STILL PURPLE! CAN ANYBODY HELP? I COULD USE IT.
24in iMac Mac OS X (10.4.8) 2gb of Memory, 500gb Hardrive, NVIDIA GeForce 7600 GT

Hi Josh,
To start, it is considered extremely impolite to type in all capital letters as you have done. Please use all lower case, or preferably properly capitalised text, in future.
With regards to the problem you're having.. the reason you only see the desktop background is due to screen spanning. If you want the external display to display the same thing as the internal display, go to the displays system preferences pane, and check the box that says "Mirroring"
The color problem is probably due to a loose connection somewhere, either between the iMac and its adaptor, the adaptor and the cable to the projector, or between the projector and the cable plugging into it. If you're still having problems, try different adaptor cables, or try plugging it into a different monitor to try to work out which one is causing a problem.
Good luck

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I recently tried to use my Samsung SyncMaster 1100 (21") as a secondary display But when I connect it with the mini dvi to vga adapter to my imac the image looks blurry. Is there some compatibility isue with syncmaster 1100?
Please Help!, I tryed the imac with a different secondary monitor and it works fine. I tested my syncmaster with another pc and it works fine. I don't know what else to do.
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Hi Josh,
To start, it is considered extremely impolite to type in all capital letters as you have done. Please use all lower case, or preferably properly capitalised text, in future.
With regards to the problem you're having.. the reason you only see the desktop background is due to screen spanning. If you want the external display to display the same thing as the internal display, go to the displays system preferences pane, and check the box that says "Mirroring"
The color problem is probably due to a loose connection somewhere, either between the iMac and its adaptor, the adaptor and the cable to the projector, or between the projector and the cable plugging into it. If you're still having problems, try different adaptor cables, or try plugging it into a different monitor to try to work out which one is causing a problem.
Good luck

Using external Display via Mini-DVI to VGA Adapter does'nt work

Hey Guys,
i recently bought a mini-dvi-to-vga adapter.
When I plug it into my macbook and connect it to my 19" external TFT, the MB recognizes the TFT as [Medion] MD30219PH but the display stays blank (no matter if i choose mirroring mode or extended desktop)...
Already changed the Hz-Rate between 59.9, 60 and 75 Hertz and the Resolution also... but nothing happens.
In extended Desktop mode i can even slide the cursor into the area where the display is supposed to be...
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thx

From what I've been told, using the computer's video output isn't outputting a true NTSC picture. I was told when talking about how the Macbook Pros dropped the S-vdieo port that I shouldn't use that anyways, but rather to go the firewire route. THat was actually converts the video source to true NTSC instead of taking a computer output to a TV. While I have no doubt that it works, I'm willing to bet that you'll see a noticeable difference between the G5 S-video and your MB using firewire. Most consumer camcorders from the past several years do digital (firewire) to analogue (NTSC) conversion, so you probably don't even need a new box.
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I bought an Apple Mini DVI to Video Adapter to connect my Macbook to a TV using normal video cable. When I connect the cable, my Laptop DIsplay gives a flickr once and then it shows nothing. I checked Display in the system preference where I don't get a secondary monitor option. My TV is panasonic and it's an old one. I work on Final Cut Pro and it's very very important to see my videos on a TV. What am I doing wrong with the connection? Anyone Please Please help...

Your probably not doing anything wrong. There are thousands of users with Similar issues and it seems to be with many different adapters.
We have Mini DP to VGA (3 different brands) and they all fail most of the time. This seems more prevalent with LCD Projectors. I've tested some (50+) with VGA Monitor (HP) and they all worked, LCD Projector (Epson, Hitachi, and Sanyo) and they all fail, DLP Projector (Sanyo) and one worked.
My Apple Mini DP to DVi works most of the time. My Mini DP to HDMI (Generic non Apple) works every time.
The general consensus is that Apple broke something in the OS around 10.6.4 or 10.6.5 and its not yet fixed. As we are a school we have logged a case with the EDU Support group so will see what happens.
Dicko

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.

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This year at Randolph-Macon College we replaced the Math lab Emac computers with IMac G5 Intel machines. The laboratory has an NEC model MT1050 projector with a manufacturer’s date of August 2002. We can not seem to get rid of ever present scan lines. We can slow them down and speed them up by adjusting resolution and refresh rates, but nothing will remove them. We are connecting the IMac to the projector via the Apple Mini-DVI to VGA Adapter. It is specifically designed for use with the iMac (Intel Core Duo), and the adapter connects to the Mini-DVI port of the computer and the VGA end of the adapter to an external VGA monitor or projector.
Troubleshooting the problem we have swapped IMac Intel computers with no luck, but we still have to use the Apple Mini-DVI to VGA Adapter. When we hook the projector to a Intel Mac Book Pro, we have to use a different adapter, but then it works perfectly. In fact, everything we try using other adapters works fine, it’s just when we use the Apple Mini-DVI to VGA Adapter that we experience the video problem.
Has anyone experienced this problem and if so, have you been able to remedy it?
iMac (Intel Core Duo) Mac OS X (10.4.8)

I don't have much to suggest, except to ask if you can try with a different mini-DVI to VGA adapter. (i.e. do you have more than one on hand to make sure yours isn't just defective?) Make sure it is firmly seated into the iMac.
I use the same adapter to provide an extended desktop on an old CRT monitor and the display is great.

No video signal using mini dvi to vga adapter.

I just bought a macmini,the last generation. Separately I bought on the apple store a mini dvi to vga adapter because when I bought the macmini I forgot to buy that....once the adapter arrived I tried to turno on the mini,everything seems to be normal,the mini works,the audio signal is normal and after the startup it asks me to choose the language,but the screen says there's no INPUT SIGNAL. I tried another mini dvi to vga adapter,the vga wire works with my pc so I didn't try another one,I tried the reset of the mini,nothing....do I have to try with "miniport to vga" adapter or is there something else I can try?

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I purchased a Apple Mini DVI to VGA Adapter for my MacBook (early 2008).
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Mini DVI to VGA Adapter Issues

Hey guys,
My first ever post to the forums. I just recently bought my very first apple computer. It is a 2.4 ghz Macbook 13" and bought a Mini DVI to VGA Adapter so that I can connect it to my 46" Sharp AQUOS TV. I connect my laptop with the dvi to vga adapter plus another vga cable of course and all I get on the screen is my wallpaper but I can't see any of the icons on my tv screen, nothing.
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Hi DoDolom,
First, welcome to Macintosh!
Secondly, it sounds to me like what's happened is that OS X has extended your desktop onto a second monitor. Plug in an external mouse and keyboard and then close the MacBook's lid. It will go to sleep. Use the external mouse/keyboard to wake it up and you should be running on just the external display.

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I am having difficulty figuring out which adapter to purchase if I want to use my MacBook to make a Keynote or PowerPoint Presentation with an LCD projector.
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I think I solved this problem.
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1. Start > Control Panel > Appearance and Themes
2. Display
3. Go to tab "settings"
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This isn't a Boot Camp compatability issue, it's just a problem with the lack of familiarity that users of OS X have with using XP.
Have a nice day!
Message was edited by: BlakeTron
Message was edited by: BlakeTron

Mini DVI to VGA adapter not working

Hello -
I just purchased a new Mini DVI to VGA adapter to use with my Mac Book. The day I bought it I plugged it in and worked great! Now after disconnecting it and reconnecting back to my Mac Book things are not so good. When I hook everything up to each other the monitor shows "no signal". Using Systems Preferences/Detect Display does not help at all. Am I missing something obvious here? I'm a new Mac junkie.

Here is an Apple article on the subject of having no video on an external monitor. It's written about the Mac mini, but it applies equally to any other Mac.
http://docs.info.apple.com/article.html?artnum=301345
And here is another Apple article that is more generalized and with fewer suggestions, though it might be a good place to start from. Good luck.
http://support.apple.com/kb/HT1573

Mini DVI to VGA adapter doesn't seem to work

Hi everyone
I am trying to link my Powerbook to my TV using the mini DVI to VGA adapter. I have made the connection and the Mac seems to be detecting the TV display, but the desktop is not appearing on the TV screen. Is there something I need to do with screen resolution settings, for example? The manual sems to suggest that you just plug in the adapter and away you go...
Any ideas gratefully received.

If it is showing the Galaxy image the signal is getting there. you have it set to Extended desktop. Go into the Dispplay section in System Preferences and chnge it to Mirror display, Check Box near the bottom of that window.

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the converter...VGA to HDMI...
http://www.vgatohdmi.net/
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http://store.apple.com/us/product/M9321G/B?fnode=MTY1NDA3Ng&mco=MTA4NDU1MTM
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http://store.apple.com/us/product/TR842LL/A?fnode=MTY1NDA3Ng&mco=MTA4NDU1Mjk
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24inch iMac with Mini-Dvi to VGA adapter, is not working correctly!

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