Output to external display

My Imac has blown graphics card on the logic board, else the machine runs perfectly except for the black screen but the screen works in safe mode. If I use an external display can I overcome this issue?

Hi Mdn,
My Imac has blown graphics card on the logic board, else the machine runs perfectly except for the black screen but the screen works in safe mode.
I don't think it can have a blown GPU ( It's a chip rather than a card. Who gave you that diagnosis? ) since if that chip was bad it would always be bad.
It seems like a software issue to me.
Have you tried starting from the install disk?
Here's a post from Mac OS X forums by kisuke3 answering:
"I'm having issues with my intel based G5 Power PC which is running OSX 10.5.6.
When I boot it up lines appear across the screen & the machine freezes. If I boot in Safe mode I do not get this issue.":
"safe boot does not load start up items. So if its not happening in safe boot it could possibly be the startup items or login items. Obviously you need to delete those startup items
1. Boot into safe mode
2. Go to system preferences>accounts>Login items Delete everything there
3. Library/Startup items Delete everything here as well
4. check System/Library/Startup items Delete only 3rd party softwares
5. Download Onyx or Main menu and clean system cache, run maintenance scripts and disk permissions "
Booting from your installer would also verify that it's software related.
Richard

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MACBOOK PRO - NO SIGNAL OUTPUT TO EXTERNAL DISPLAYS

When connecting any external monitor I have an intermittent issue where it does send the signal to the external display - yet it shows the display's preferences in the Control Panel. Had an embarrassing moment at a presentation with an LCD projector. Have used severalo DVI adaptors. Any ideas? It works sometimes, sometimes it does not. When it works I cannot close the lid either without it turning off everything, which used to work fine.
Any ideas?

It's too bad you never received any help on this in the Forums, but was hoping you may have come across a solution in the last 2 years.
I am not a techie, so my explanation will be crude, but sounds exactly like your issue above. It's October 2013...I have a 2008 MacBook Pro. Everyone tells me I can use the miniport to connect to my 2010 LG TV. I purchased a Mini DisplayPort to HDMI Adapter from RadioShack (Gigaware brand). I plugged the adaptor into my minport, plugged the HDMI cord into the adaptor, and plugged the other end of the HDMI cord into the LG TV (44"). In my display preference, the MacBook recognizes the TV. However, there is virtually no picture...
I get extreme fuzz/snow with colored pixels, with the background display flickering on every 30-45 seconds behind the fuzz (i.e. very grainy). On one occassion, the display showed up perfectly for a nanosecond and went back to fuzz. Common sense is telling me that the image is trying to be sent to the TV but the signal is not strong enough? Or, the encoding is not fast enough?
Tried the following:
Grabbed another HDMI cord in case it was the originally cord - no dice.
Tried all 4 HDMI inputs on the TV - no dice.
Myriad other non-technical things like moving the MBP around, jiggering with connections, etc. Nothing.
For purposes of meeting my needs, I ended up downloading the latest Apple TV software and ended up displaying my presentation via Airplay from my iPad. But that solution drops a lot of the key attributes of my presentation (slide builds don't work, certain graphics missing, color is off, etc). It worked sufficiently, but I was hoping for a more solid presentation solution.
Thanks for listening!

Display iMovie output on external display?

I would like to be able to occasionally display the iMovie I am editing on a real TV screen for others to observe and comment on - sort of like what I recall Professional Video Editors use. I've used a jury-rig setup several times (but I am not very happy with the output) where I use the S-video to composite adapter, a y-adapter for the audio (though this time no audio was coming out so we listened through the PowerBook's speakers), the longst RCA cables I had and mirrored the TV and LCD. Thank the gods for Bluetooth mice...
Anyway, what I would prefer to be able to do is use our Canopus ADC300 to send the video signal out the same way is came in - through a long FireWire cable so I can vegitate in my recliner while I do the iMovie edits the viewers are asking for. I do not want to export the iMovie, I just want to have what I guess would be called a "live preview".
I encountered a how-to on this Apple Developer goodie:
SimpleVideoOut
(http://digitalmedia.oreilly.com/pub/a/oreilly/digitalmedia/2004/12/22/video_out. html?page=1)
but it seems to only do its streaming magic with an existing QuickTime file.

Hi Notary,
goto iM prefs..
choose playback options
choose playback on dv-camera (or whatever it is in english...)
now, the fullscreen playback of iM goes thru the fw connection to your camera/hopefully converter... connect your monitor, beamer whatever at the analogue-outputs of camera/converter...
have a look in the manual/tutorial of iMovie......

ThinkPad Yoga won't connect to external display

I just received a ThinkPad Yoga and have not been able to get output to external display.
I am using mini hdmi to display port.
Lenovo tech support was completely useless.
Does anyone have experience with this issue?
Thanks

First, try resetting the parameter RAM:
Hold down keys CMD-Option-p-r on startup until you hear the second chime.

MacBook Pro sees external display but no output

13" MacBook Pro 2.3 Intel i5 8gb ram 500gb hybrid Hdd OS X 10.7.4 Thunderbolt port
mini display port to DVI and with HDMI adapter works fine
mini DP to VGA adapter will see VGA monitor (tested on 5 different monitors) but will not display anything on external display. Newer displays just go into power saving mode and older VGA displays just are blank. Even tried DVI to VGA adapter on mini DP to DVI adapter with same issue. I'm guessing I have no analog output from the DP port. tried the SMC and PRAM reset with no results.

problem solved - replced mini DP to VGA adapter - first one defective

Turn off external display output?

I've bought a nice big LCD TV mainly for consoles. Because I have it next to my iMac i've also connected that to the TV using a mini-dvi adapter and a dvi-hdmi cable.
It works great but I only want to use it for playing downloaded video and the like on the big tv.
When I'm not using it I want my iMac to free up the resources it must be using to achieve screen spanning but I cannot figure out a way to tell the iMac to disable external display output.
I've tried display mirroring figuring that it won't be eating up video RAM, but it causes page tearing on my mac when dragging windows around for example.
Even when the TV is unplugged from the mains the mac seems to be outputting to the dvi out, the only way to stop it is the yank the mini-dvi connecter from the back.
Are there any hacks or utilities that can manually turn dvi support on and off?

Hello Mark
I'm using a 27" flat screen TV, mini DVI and 12' S-Video cable.
Mostly I watch DVD movies on that Display while working at the iMac's 17" it's also great for iPhoto Slideshows and PowerPoint.
Not to worry the TV supports it's own display and all you are doing is sending a signal to it's video card. Just turn it off or change the channel.
I tend to stay away from mirroring for the same reasons, but also because the TV's across the room.
Again not to worry the TV supports it's own display and all you are doing is sending a signal to it's video card. Just leave it connected up to prevent damage to DVI port, Adapter and cable. "yank not"
Just be sure to gather up all your windows back to the iMac Display befor shutting off or changing the channel.
Dennis
17" iMac Intel Core Duo 1.5GB Ram Mac OS X (10.4.9) Maxtor 300GB FireWire Creative Inspire 2.1 2G Nano

Connecting HP 2311x display to new macbook pro Retina - no output on external screen

I have a brand new MacBook Pro 15 in. with Retina display. I also have a HP 2311x monitor. When I plug in the HDMI cable, the external monitor says "check video cable" and the preferences "arrangement" thinks there is a display - even recognizes the type - but the external display just wont display anything but the "check video cable" box. I spent 2 hours on with apple yesterday, they had me do all sorts of resets and stuff - but no luck. The HDMi cable works when connecting a pc to the screen. When connected to by macbook, the screen on the macbook likes to flash black and its annoying. I have gotten really used to working with two screens.... and apple's suggestion was to buy a thunderbolt cable and try that. As it is, with this new macbook I have to buy a bunch of cables, I really don't want to buy another one when I am not sure that will work. Darn things are expensive when you are buying 4 connectors at once (ethernet connector since the speed via wireless is noticably slower; magsafe to magsafe2 converter; thunderbolt for my printer; and a connector for the monitor at home which doesn't have an hdmi port).
Any other suggestions before adding another to that list? Since Apple seems to be out of ideas... any info would be appreciated.

I have an HP 2311x as well. I'm using an HDMI cable and am not having any issues getting the screen to display. I know you said the cable works with a PC but have you tried a different HDMI cable just in case. It might be worth a try. Other than that, I'm not much help.
The issue I had when plugging this monitor into my MBP retina was that the image was very blurry on the HP 2311x. I almost gave up on using it and was going to just buy a Thunderbolt display but after much research I found a custom firmware update that fixed the underscan/blurriness issue. So be prepared for that if you get the screen to display.
If I can find that resource, I will post it here.
Good luck!

MacBook Pro cannot connect to external display (projector) under Windows

Our office has got one of those lovely new 13" MacBook Pros and we cannot figure out why it cannot connect to either of our 2 projectors with Windows 7.
We have an older MBP with NVidia graphics that connects just fine under both OS X and Windows. And this machine connects fine under Snow Leopard.
There was a recent Thunderbolt chipset update and we applied that; on the Windows side the Intel driver has been updated but nothing happens. Have also zapped the PRAM to no effect.
To add another wrinkle: I just connected the MBP to my Cinema Display and the external display shows fine in both OS X and Windows--Windows didn't even require me to go to the control panel.
This leads me to two thoughts: either it is something with the Thunderbolt to VGA adaptor (hard to believe, though, since it works for OS X) or it is something to do with the native resolution of the projector (equally hard to believe, as changing through various settings in Windows NOTHING happens on the external projector--it doesn't blink, go back or anything.)
Any ideas?

I wish I could find the discussion, but I cannot.
There was a discussion about the Windows 7 driver for the Thunderbolt port. The conclusion I believe was that it only outputs digital signals, not analog.
The other conclusions were:
A USB-VGA adapter adapter bypasses this limitation because the driver is in the adapter itself and works regardless of the OSX/Windows operating system in charge.
Run Windows under VM, where OSX is in charge and can create analog output through Thunderbolt
If only I could find that thread ...

Problem with T400 and External Display....

I have a new T400 (less than 1 month old) with the shared memory Intel Graphics setup and I cannot get it to work with an external display of any kind.
I've tried 2 LCD panels (one widescreen, and one 4:3), 2 analog monitors, and a video projector without any luck. All of the displays I have tried work fine with my older Lenovo R61.
I've updated to the newest display drivers and tried working with the various settings under Graphics properties in Vista - Single Display (notebook, monitor), Intel Dual Display, Extended Desktop, etc. The best I got was a cloned image on the larger widescreen LCD panel that appeared for about 1 minute and then stopped. I recreated this 4 or 5 times, but the image would not stay on the external display.
Any ideas?
Thanks,

go into bios, check your video output option and whether you selected Internal + VGA, i think... i will check for you on my X60s....
Regards,
Jin Li
May this year, be the year of 'DO'!
I am a volunteer, and not a paid staff of Lenovo or Microsoft

Macbook doesn't recognize external display

I am trying to use my tv as an external display. My Intel Macbook doesn't detect my tv as an external display, this is because I am using an unconventional connector (VGA to RCA connector).
Anyways, I am wondering if there is a way to force my laptop to output video over the mini-DVI out port on my computer. I am thinking a utility or something would be able to do it.
This is my setup:
mini-DVI out from computer>
mini-DVI to VGA cable from apple>
VGA to RCA(yellow video cable) (from hong-kong)>
AV in of TV (RCA yellow video cable)
I realize that the VGA to RCA makes my computer not detect my tv, I am looking for a work-around.
Macbook 2.0GHz (White) Mac OS X (10.4.8)

You just need the Apple mini-DVI to video adapter. It has both a composite and s-video output.

External Display wil not work when I close my MacBook Pro

Help! I'm using a Vizio LCD with Bluetooth Keyboard and Mouse and I'm trying to use just the display with the MacBook Closed and Powered, but as soon as I do that the Screen on the VIzio dies. I worked for a while but now it won't work anymore. I can here the mouse and keyboard working but the screen on the Vizio will not display anything. bought a the only thing that I'm thinking is that i bought a cheap HDMI to DVI cable at Walmart..could that be the problem? Any feed back would be welcome. Thanks

6 With the computer turned on and your wireless keyboard or mouse paired, connect the other end of the adapter to the video output port on your MacBook Pro.
7 Once your computer's Desktop appears on the external display, close the MacBook Pro lid.
8 Once it's closed, wake the computer up by either clicking your Bluetooth mouse button or by pressing a key on your Bluetooth keyboard.
You mean it never wakes the external monitor at this point?
http://docs.info.apple.com/article.html?artnum=300562

Two External Displays and Internal Display Over Different Connections

Hi there.
I'm going to be purchasing a rMBP in the very, very near future. However, I am unclear about how external displays work with this. My current display setup at work is two basic 1080p monitors that can be run over DVI, VGA or HDMI. I'd like to keep using these when I start using the rMBP but also gain the advantage of a third screen by using the internal display at the same time (so much space for activities!).
One of the thunderbolt ports will need to be used for an Ethernet connection (there is no wireless here), so this leaves the setup needing to be one monitor run via Thunderbolt -> DVI and the other monitor run via HDMI.
The internet in general isn't being entirely helpful with this. I'm looking for a clear answer of whether the rMBP will run the internal display and the two external displays using this setup under OS X. Some seem to believe that it won't work using different connection types, for example.
Thanks for any help.

Hello dljfield,
Thanks for using Apple Support Communities.
If you'd like to use multiple external displays with a MacBook Pro with Retina display, then please take a look at the information outlined below. A 15" MacBook Pro mid-2014 can support up to two external displays using different outputs.
MacBook Pro (Retina, 15-inch, Mid 2014) - Technical Specifications
OS X Yosemite: Connect multiple displays to your Mac
Take care,
Alex H.

External display won't work over DVI

I've got an ViewSonic vx2025wm hooked up to my MacBook Pro. It used to work fine over DVI, but some time ago the monitor stopped being able to detect the signal and I had to switch over to VGA (via my Apple DVI-to-VGA adapter). That works fine at the full resolution of the external display, but the image quality leaves something to be desired.
Strangely, the external display works just fine in Windows XP via Boot Camp. Oh, the irony!
Any ideas on how to get this working again? I dread the OS X re-install.

Same problem here. Had a Dell 30" monitor plugged in for a long time. Suddenly stopped working yesterday. The symptoms: the Mac detects the external display and "thinks" it's got it there (I can tell because the active content of the window is gone on the laptop's screen), but the display does not successfully see the output from the Mac (it shines its orange "no signal" light).
Restarting does not seem to help.
I should test it with a new display cable, but am a little reluctant to do this, as the dual link DVI cables required for this monitor are so expensive, and because previous posters on this topic have tried swapping cables with no result.

Ongoing fatal crash and security bug related to connecting external display

The infrastructures in OS X to resume from sleep, to authenticate, and to change displays is fundamentally not working.
The security bug I have encountered has to do with connecting a cinema display exclusively to a MacBook Pro. This is a specific situation, but please note that I have experienced the same problem on no fewer than three independent laptop. Plus, the Genius in the Apple Retail Store was convinced of the general instability of this infrastructure. The security problem is that hot corners no longer function if I transition between two states in the same reboot. The first state is where I have the laptop powered on and using its own internal display exclusively (when I'm on the road). The second state is when I have the laptop displaying its output exclusively on an external display (when I'm at home). What happens is that an attempt to use hot corners fails. There is no response. I even added configuration on all four corners (whereas I originally had settings only for the rightmost corners), and even then, the hot corner action (of sleeping the display or entering locked screen saver mode) does not commence. This prevents the user from being able to secure the display on demand using standard methods that are supposed to work.
The instability level related to connecting the external display exclusively is high. Again, I've experienced this on no fewer than three independent laptops, and the Apple Genius at the Retail Store confirmed that this aspect of OS X did not work consistently. When I want to connect the cinema display to the laptop in such a way that the laptop's own display is not part of the active screen, the process I use succeeds about half the time. Supposing I have been on the road, where I am using the laptop display exclusively. I then put the laptop to sleep. When I return home with the lid open, I connect first the USB (power) from the cinema display to the laptop, and then I connect the Mini DisplayPort. When that step works, what happens is that the login screen shows on the cinema display despite the fact that my laptop lid is closed. This is good, and is what I want. At that point, I open the laptop lid and quickly log in.
With Apple being a mobile device company, I rely on the laptop for tasks that one traditionally may use a desktop for. This simply points to the versatility of the laptop. But I'd like the bugs resolved, so that I do not have to hesitate to make use of the inherent flexibility possible with the MacBook Pro.
Here's what happens when the process (of connecting the external display in a way that establishes itself as the only screen in use by OS X) fails. Firstly, when I connect the external display via Mini DisplayPort, the laptop doesn't even respond. Instead, it remains asleep. So to work around it I have to repeatedly disconnect and reconnect the Mini DisplayPort so that the asleep MacBook Pro will see that there is a display connected to it. Also, sometimes that isn't even enough and I have to open the laptop lid, and put it to sleep again so as to trigger whatever actions are necessary to recognise the external display (presumably by having the laptop recently awake). Around half the time, I have to play this game of disconnecting and reconnecting until it actually works. This high level of reproducibility (confirmed by the Apple Genius representative's confidence that this part of the system doesn't actually work) should make it easy for an engineer to look into the problem.
Fatally, and recently, OS X has completely crashed when I have attempted to connect the external display. The external display has gone completely blue, and after a half a minute, it blanked out and my entire laptop became unresponsive. I called Apple Support and was given a case number. I also took the laptop into the retail store to see if I could recover my current session without rebooting. There was no process suggested to make that happen and I was told to reboot the machine. I've had this happen before on other laptops, and it is frustrating that the kernel reaches such a state that it cannot be used. As I see it, this problem is not too unrelated to the way that I need to play a game in order to get the external display connected exclusively. Here are some workarounds that could be added:
Firstly, whenever I connect an external display, I'd like the laptop to see that this has happened, and to take action accordingly (such as resuming from sleep). Secondly, If I connect an external keyboard, and press a key on it, I'd like this to wake the laptop too (in the event that the first method fails for some unforeseen reason). I'd also like the connection of the cinema display's USB power not to cause the laptop to enter into a confused state between asleep and awake. Sometimes I need to disconnect and reconnect USB power in order to trigger the laptop into waking, but that's only because it's not doing it on its own properly. On the other hand, I also ensure that the laptop doesn't have the Mini DisplayPort connected without also having the cinema display USB power connected, because that also is an unsupported configuration.
I've also gotten the laptop to become confused about whether it is asleep or awake. When I open the lid, it seems to enter into sleep mode, but closing it seems to bring it into an active state.
Also, I've successfully logged on and authenticated with the screen showing exclusively on the external display. But just ten seconds after I start using the system, the laptop falls asleep--with the lid open! Whatever triggers that action doesn't seem to be on track. The laptop is open, there are incoming events such as mouse movements and key presses, and the external display is on and is in use. And then the laptop falls asleep! This has happened numerous times. Not only should this not happen; the instances where it does happen can cause further instability and put my system at risk of fatally crashing.
Also, the authentication system itself is highly buggy--far more than it should be. At times I have opened the laptop lid and caught a glimpse of a window before I have begun the login process. Also, an external authentication application that asks for Kerberos/AFS login credentials has been able to overlay itself on top of the primary authentication (whereas I should only see a single login dialog when I need to authenticate to the system). Also, I've had several of these authentication screens overlay on top of one another, although it's been months since I've experienced that one (so it may have been fixed). Also, around a third of the time, the window that authenticates me (on the black background) somehow transfers itself into the background (even though there's only one window!). What that means is what I begin to type my password, and now the laptop starts beeping at me and I need to manually click on the password field and begin entering my password again. This really shouldn't happen, and indicates too much complexity in this authentication process (such as, more OS X code is involved than is strictly necessary, which is likely to make the authentication system more difficult to test). Also, at times, I have been using too much CPU, such that the authentication screen takes too long to emerge. That also means that I'm not able to logon until I uncleanly shutdown the laptop. If the laptop has been asleep, and is revived in preparation for login, then that login screen should be given highest priority, even if there are other heavy CPU or I/O intensive tasks running in the background. And maybe the login dialog shouldn't disappear when the user is legitimately attempting to log in. So even if there is a possibility that the system is under heavy resource use (or there is a stall or minor deadlock), it shouldn't prevent the user from logging in altogether.
At the moment, the very fact that the system shut down uncleanly means that the full disk encryption suite that I used has entered into an undetermined state, suggesting I may lose access to all my data. It's my hope that I can rely on Apple's products to interoperate in a way that won't cause me to be fearful and restrictive in my use, so that I can freely connect an external display at times, and at other times carry the laptop on the road.

Ive got the same problem with Samsung UE225010 monitor too, its full hd but it looks terrible, could it be Displayport adapter issue, because couple month ago Ive tryed with some IPS display, and it looked same bad.

Background Job result output should be displayed in Email body

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Output to external display

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