External LCD flicker (timing standard problem?)

My external LCD panel flickers when connected via DVI. It basically looks like a CRT refreshing. If I connect it with VGA, it doesn't flicker. It doesn't flicker when connected to a different machine. And it doesn't flicker if I boot the machine into Windows.
I've tried setting different refreshes on it with SwitchResX to no avail. Again, it works perfect in Windows, but my built-in LCD has whine in Windows when not at full brightness. So, in handy chart form:
OS X
Built-In: Perfect
External: Flicker
Windows
Built-In: High pitched whine when not at full brightness
External: Perfect
The only conclusion I can draw from this is that it is related to the use of different timing standards or something of the like. Clearly all the hardware is fine.
So, does anyone have any idea how to go about changing the timing standard used in OS X?

I'm experiencing almost the same problem as you: When I connect an external LCD projector to my Macbook Pro via DVI/VGA adaptor, I notice a flickering of the LCD projektor. The intensity of the flickering seems to depend on the frequency I adjust in the monitor control panel. Unfortunately there's no frequency that fits the needs of the LCD projector.
Any idea to solve this problem is most welcome!

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Blackmagic Intensity Pro problem plackback on external LCD TV

Hi there,
Recently installed Intensity Pro card on my Mac Pro and trying to work on FCP6. I use a 1280x720 9 sec footage for testing but there's a problem to playback on a external LCD TV via HDMI cable. The playback on FCP canvas plays fine but the LCD TV just showing a still image. I've tried to test on a SD 720x480 footage which works fine both on FCP canvas and LCD TV even a general CRT 4:3 TV. Sure I have select the Video Playback under View to "Intensity HDTV 720p 60". Are there any other settings need. Will anyone knows what happen or need any settings? Please advice.
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Kory

Kory - the BlackMagic card is temperamental.
With FCP, I've found that if I capture using the card, for a few seconds, that the output to the HDMI monitor gets 'fixed'.
Or, sometimes it will just start working on its own. Maybe after I stop and re-start FCP.
I even returned my card for replacement. Unsure why they have such issues. But once you figure, by trial an error, a technique for getting the display to work, it does basically work. It's just quirky.
With Motion output, sometimes I have to use the wrong output rate to see the output, and - then suddenly it will decide it wants the correct output rate.
But, I'm going out at 1920 x 1080 - and haven't tried other resolutions.
Good luck. Try complaining to BlackMagic and see if you can escalate the problem up the food chain. Maybe if enough complain they will fix it (they were telling me that it wasn't supposed to display 1080p, but it certainly does - well, somehow converted to 1080i by the card or by FCP).
One other thing you might try, is an HDMI switch from monoprice. Might help with locking on the hdmi output. I use one of those for monitoring from hdmi input of camera, and I seem to remember playing with it while dealing with the no picture, or still picture issues of HDMI output to my monitor.

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We have used an Envision external LCD monitor with this iBook for one year with no problems, and now suddenly when we connect it to the iBook the colors are all way distorted (no red, or all blue), on both the iBook display and on the external monotor. When we disconnect the external monitor the colors on the iBook display return to normal. HELP!!!! What could be causing this?
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Changing the adaptor cable solved the problem.

X61 on ultrabase using Vista - problem displaying on external LCD

We have a Thinkpad X61 docking on an Ultrabase. It worked well for months. The problem exists since two months ago, and I don't know if it was due to some updates to the system. It is running Vista:
When the notebook first boot up, everything okay, even showing the logon screen. After the user logging on, and the Vista desktop shown. All of a sudden, the external LCD blank, and a message on it says we need to set it to 1280x1024 for best performance. Now, if I open the notebook's LCD, the external LCD gets back to live as well. Next, we close the notebook's LCD, the external LCD still working.
I tried to replace the LCD monitor with a Sony, and the same problem persists. The message on the external LCD said something like "cannot support 99MHz frequency...."
I tried another Ultrabase with the same notebook, same result.
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May I ask if anybody have the same problem or can give me some hints to solve the problem?
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Thanks.
Apparently my problem was I needed to unplug the TV and then let it recognize the Mac.
Now it works, but not perfectly.
The TV wants a 1920 x 1080 resolution, while the Mac is sending over 1920 x 1200. That's not working as each screen has different issues.
The iMac screen has about an inch of horizontal black space on the top and bottom of the screen, while the Samsung's screen is "full", but it's a little off. Meaning, it's cropped part of the image all the way around.
I was told by Apple that I can only display 800 x 600 if I want the screens to match, which is unacceptable.
Anyone know how to trick a Mac into displaying 1900 x 1080?
Message was edited by: Artie5438

How to switch off laptop screen when you connect external LCD?

Hello, being new to Mac I'd like to ask if it is possible to completely switch off the laptop screen when you connect an external LCD screen and use it as your main desktop. My MacBook Pro does that automatically when I launch a full screen game, say World of Warcraft, but I would like to be able to do it manually.

If you have it connected to a keyboard and mouse, you just shut the lid and use it that way. Of course, I'd be curious why you wouldn't want to use the screen. Having two screens can be extremely useful. The only problem with it is that then you may miss it when you are away from your second screen!

Brand new macbook pro 15" when connected to external LCD display in high resolution ,flickers often

Hi,
I have brand new macbook pro 15" with retina display.
I have connected external LCD display (Samsung B2230) using Apple VGA adaptor & thunderbolt port. But LCD display flickers quite oftenly. I read community blogs where many macbook pro users like me are facing similiar issue.
There is no problem with LCD display as it works fine with Lenova laptops.
Can anybody please provide me the solution to this problem.?
Regards,
Sam

Hello there, Sam.
The following Knowledge Base article provides some great steps for troubleshooting your issue:
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/ht1573
Thanks for reaching out to Apple Support Communities.
Cheers,
Pedro.

Equium A100-147 - Native resolution on external LCD doesn't work

Hi,
My Equium A100-147 has 1 VGA and 1 S-Video output, so I'm using the VGA output on a external LCD monitor with native resolution of 1680x1050@60hz, but the integrated Intel 945 graphics card doesnt give me the right resolution to choose for this monitor, the most close is 1600x1200 and some another weird widescreen resolutions that make my monitor scaling show a ugly image.
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I have another laptop MSI Wind with the same graphics card built in and the very same driver version, and the laptop detects both monitor and the right resolutions for them, so it's not a monitor driver problem.
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actually the resolutions available to external monitors here on the intel control panel are
800x600
1024x768
1280x1024
1400x1050
1600x1200
1856x1392
1920x1080
1920x1440
2048x1536
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I've just hooked my 1080p hdtv via VGA and I'm able to use 1920x1080 16:9 aspect ratio
seeing this another resolutions that aren't on the manual, maybe its possible to make custom resolutions as well.
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External LCD will not display red

I have an external LCD monitor that has worked fine in the past, but today will not display the color red. Red is displayed as a grey. The monitor is functioning properly, as proved by connecting to another computer using the same SVGA cord. The mini-VGA to VGA adapter was not used when the second computer was used to test the display. Adjusting the calibration seetings on my iBook do not help. There do not appear to be any missing or bent or dirty pins.
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ONUPolarBear, Welcome to the discussion area!
Could this be a problem with the mini-VGA to VGA adapter supplied with the ibook or the mini-VGA jack itself?
Yes
If so is there a not so expensive solution?
The adapter is only $19US.

External Monitor flicker... HELP !!!

iMac9,1 with mini DisplayPort to VGA external LG-W2242 in extended screen model.
Used to work well; recently flicker at 1680x1050.
This problem happens only at 1680x1050, and it is now at 1440x900 and is working.
But, the resolution is not the monitor optimum resolution at 1680x1050.
Not keen with SwitchresX or DVI solution.
Grey unselectable at 56 or 75Hz, how to activate this selection?
Or any other alternative solution?
Thanks

Finally, I did more research and confirm that the problem is not related to Hardware.
It does not matter if you have Apple Mini DisplayPort to DVI Adapter or VGA Adapter.
I had in other thread, and understand that SwitchResX can solved this problem.
https://discussions.apple.com/thread/2387462
It has to be a OS problem, I tried it today with SwitchResX; and confirm that it can work with 1680x1050.
https://discussions.apple.com/thread/2650682?start=30&tstart=0
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Hello.
There's a recomendation on Amazon.com to use the Sony SDM-S73 LCD with the Mac Mini. I noticed this AFTER I purchased the monitor for use with my iBook G4.
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Has anyone else had a similar problem with their iBook? Anyone used a Sony SDM-S73 with their iBook or a Mac Mini?
I have a friend who is considering a Mac Mini and was looking for a good, cheap LCD but I hesitate to recommend the Sony for use with a Mac based upon my experience-- Sony was no help when I contacted their technical support. The tech support agent stated that they don't have Mac support and to contact Apple...
iBook G4 800 Mac OS X (10.3.9) Sony SDM-S73 17" LCD Monitor

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So my Titanium Macbook Pro's screen went out yesterday and it's no longer covered so I've been trying to figure out how to get it to work with an external LCD monitor.
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Answered here: http://discussions.apple.com/thread.jspa?threadID=2725868&tstart=0

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I believe the max resolution for macbook is 1280 x 800 (internal/built in), which is lower than external lcd native resolution. But here is said :
Extended desktop and video mirroring: Simultaneously supports full native resolution on the built-in display and up to 1920 by 1200 pixels on an external display, both at millions of colors
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Hello,
I have recently purchased a Mac, hoping that I would be able to connect to my external LCD monitor (19" Samsung SyncMaster 920NW - only VGA connection).
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I have read other threads where people complain about similar things. But, I thought Samsung's monitors would be of higher quality. Mine is a relatively cheap LCD but not this cheap
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Hello stedman1,
Thank you for your quick reply.
Unfortunately, it is not running in the Mirror mode. The display with the mirror mode was even worse! But after reading the posts in the forum, I have learned how to change it to the extended display. It is better than the mirror mode, but still not good enough.
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The very first MBP (CD 2.16) supported external monitors up to 2560x1600,(such as the Apple 30") psiforce. So does the C2D with ATI Mobility Radeon X1600. See http://www.everymac.com/systems/apple/macbook_pro/stats/macbook-pro-core-2-duo-2 .16-15-specs.html
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External LCD flicker (timing standard problem?)

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