MiniDisplayPort to VGA not working to the external monitor. macnook 2014 13' yosemite

MiniDisplayPort to VGA not working to the external LCD monitor.please help!

Howdy aimilios__,
If you are having an issue with not getting video on your external display from your MacBook Pro, I would suggest that you troubleshoot using the steps in this article -
Apple computers: Troubleshooting issues with video on internal or external displays - Apple Support
Thanks for using Apple Support Communities.
Best,
Brett L

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Hi,
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Regards.
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Here are the actors in our play today
1. MacBookPro A. (my system a CD2 2.16 with OSX 10.4.9)
2. MacBookPro B. (my friends system a CD2 2.16 with OSX 10.4.9)
3. an iBook (my friends 1.07 GHz G4 with 10.4.8 and a VGA adapter)
4. DELL 2300 MP projector
Plugged in DVI to VGA adapter to the virgin MacBookPro B (never had the projector plugged into it before) Dell projector shows that it recognizes an analog RGB 800X600 signal from MBP B. It projects a beautiful desktop. All is well for a moment.
In Display preferences we see for the MBP B
Color LCD, Display: 800X600 stretched, Colors: Millions, Refresh Rate: N/A
VGA Display
Now, I unplug the DVI to VGA adapter and naturally MBP B readjusts to it's native resolution. Great.
Now I immediately plug back in the DVI to VGA adapter. The computer and the projector searches for signal with none found, while the computer shows no attempt at an automatic readjustment as above (800X600 stretched).
I try the 'detect display' option. It causes computer to stall for a second (as it searches) but it does not detect projector and does not readjust it's own resolution to 800X600 stretched as it did initially. F7 key does nothing.
This is a problem!
So, I shut down the projector. I unplug the projector's power source and waited 20 seconds. plugged it back in, started projector back up.
I shut down/restarted the MBP B.
I plug back in the DVI to VGA adapter into the MBP B. The MBP B screen flashes to all blue, but does not automatically change to 800X600 stretched (remains at native resolution and does not recognize an external monitor/projector)
Enter the iBook!
I plug the iBook's VGA adapter into the projector. The projector shows that it recognizes an analog RGB 1024X768 60Hz signal and projects desktop screen immediately. Plug and play!
iBook display prefs reveal:
Color LCD, 1024X768, colors: Millions, Refresh rate: N/A
Color tab: Generic RGB Profile
VGA display, 1024X768, colors: Millions,
Now. I unplug adapter from iBook, iBook readjusts to native display
plugged back in adapter to iBook, immediately recognizes and displays projected desktop.
Scene 2: The FREAKY thing!
Now, I immediately (after unplugging the adapter from the iBook) change adapters to the DVI to VGA adapter and plug the projector into the MacBookPro B, whallla! Back in business. (computer screen adjusted to 800X600, and projector recognized signal).
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Now, logically I try again to immediately unplug the adapter from the iBook and switch adapters and plug back into MacBookPro B-it worked once right? But, sorry, NOT twice. The mystery deepens.
Well, I think, maybe it is because I didn't restart MacBookPro B before attempting the switcharoo from iBook to MacBookPro.
So, I plug back into iBook-projector. And the iBook works immediately again.
I restart MacBookPro B and plug in to the freshly restarted MBP B...HOUSTON WE HAVE LIFT OFF! The MacBookPro B recognizes the projector and the projector kindly displays the desktop.
Now what about MacBookPro A...Last time, when I did the switcharoo, it corrupted something to cause the MBP B not to work. Let's try it again. Will this plug-unplug-restart-switch adapters-immediatly plug in technique work...let's see. I restart MBP A, and plug DVI to VGA adapter in. Sorry. Same ol' no signals recognized. MacBookPro A not auto readjusting resolution, and does not list any projector in display prefs.
Let's get crazy and immediately plug the adapter into the MacBookPro B...it works-oh so logical...NOT! Why wasn't it corrupted this time by MBP A? MacBookPro B readjusts its screen to 800X600 stretched and projector immediately recognizes and projects desktop.
Now lets see if I can break it again as before. I unplug it from MacBookPro B and back into MacBook Pro B, knowing that this caused it to stop working previously. And...it still works-WHAT? I do it a third time. It still works on MacBookPro B.
So,
I plug it back into MacBookPro A...still nothing. Back to MacbookPro B works like a charm. This time it struggles a bit showing that initially it sees a signal from MacBookPro B of 1192X900 (i Think), then the MacBookPro B switches automatically to 800X600 and the projector works.
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I unplug DVI to VGA adapter and plug back in to MBP A and 'Boom' the projector is recognized again...no it couldn't be!
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Back to the good ol' iBook. Of course it works.
Now switching over directly to a restarted MBP B. -DOESN'T WORK (as it did using this technique previously)
Now switching over to MBP A- DOESN'T WORK.
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Any thoughts, ideas, ways to diagnose? Thanks!

VGA not working.

Hello all
I'm using a T-60 with the intel 950 integrated graphics. My VGA port isn't working, and I can't seem to figure out the problem. I'm trying to connect it to an external monitor. It worked one day, and failed to work the next. The funny thing is:
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--A broke college kid.

Hello all
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Is there anything that I can adjust in the bios? Could vista be the problem?
I already contacted customer support, and they won't help me with the issue unless I pay them some obscene amount of money, as the computer is out of warranty.
Any ideas or suggestions would be GREATLY appreciated.
--A broke college kid.

External monitor simply not working - including with external dock (dual screen)

I can't get the external monitor (aka dual screen) to work on my T60 via the VGA port. My model is currently running Windows XP and has a ATI Radeon X1300 video card.
I'm 6 months out of warantee (although this problem started while in warantee but I can't convince Lenovo of that).
I've tried the following:
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Michael
Message Edited by mstrom on 07-03-2008 04:03 AM

T23FUN wrote:
Hi,
Does the external connections and cables work with another system. I'd do that first.
If all of it works with another system then it could be drivers or internal things but try that first.
There are some driver updates on the Lenovo site. Make sure your BIOS are updated and such.
Good Luck,
Yup, checked the cables and monitor with another system (actually with the same laptop using a USB->VGA adaptor which isn't a long-term fix)
Also updated to all the latest driver including a BIOS update (which I forgot to mention).
thanks,
Michael

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Message was edited by: Laquacer Daniel

Vinayak,
Thanks for your response as you were the only one to respond, however this site was redone in Muse, and worked in the previous site (which was not created in Muse) whether the user login or not. The only one who has sign-in capability is the owner of the account the, hence the salon owner. Her clients had been using the site before to make appointments...the link recently stopped working after it was published. Is their anyway around this? such as altering the way Muse create hyperlinks? Could an anchor be used instead,? How would that work? Just grasping for straws and want eliminate possibilities.
Thanks,
Laquacer
Re: My hyperlink is not working in the site I just published in Muse
created by Vinayak_Gupta in Adobe Muse Bugs - View the full discussion
The link https://appointment.bizlinkms.com/?page=appt is to an external site that probably requires a login first in order to access it (and hence the session error). You are able to access that page from a particular machine as you are most likely logged into that site already and hence the cookie exists in your browser that is maintaining the session.
On a quick look, the site's login page appears to be https://system.bizlinkms.com/
Nothing to do with Muse though.
Thanks,
Vinayak
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Hi,
This is very URGENT!
Today I was working with my pc, I have connected a monitor through VGA. Suddenly screen flicker, then some pink dots appear fallowed by BSOD: Video_TDR_FAILURE.
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Hello nerijusgood,
It appears that you had a bsod error, that since this you've booted into safe mode and corrected parts of the issue, but can no longer get the display adapter to install. I will try to assist you with this.
Based on everything you have done, the first place to start would be hardware. You should be able to test it and this document can help you in doing so: Testing for Hardware Failures (Windows 8).
Start with the above and let me know the results.
Thank you for posting on the HP forums.
I worked on behalf of HP.

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MiniDisplayPort to VGA not working to the external monitor. macnook 2014 13' yosemite

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