Problem: MBP Is not allowing external monitor Widescreen resolutions.

I am using a 27" LCD HD TV (Yes, TV, not monitor) DVI->DVI and the MBP will not allow me to use a widescreen resolution on my external monitor.
Yes, I assure you, it is Widescreen. The native resolution is 1280x720.
Anyone have a clue how I can fix this? Running a stretched 4:3 screen ***** HARD. This was my old windows PC monitor and I never had this issue before.

Hi,
I've got the same problem. Tried SwitchResX with not much success. I'm using as second screen a Benq w100 projector. When I force resolutions like 854x480 at about 60Hz, the projector won't recognise it, which makes sense since the input is not supported as such from a PC.
I think the clue would be sending a HDTV/HDMI signal through the DVI cable. Has anybody managed to do this with the ATI Radeon X1600 that comes with the MBP?
Gabriel

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MBP does not detect external monitor on DVI connection...

(2007) MBP C2D 2.33 15", OSX LION 3gb. Worked fine till about 3 days ago (right after installing the last round of updates).
My external monitor now fails to connect on DVI cable. Since it also has VGA, I was able to test this way with a DVI to VGA adapter and that worked perfectly, but the vga gives a lower resolution. Having estalished that the graphics adapter and the monitor were okay, I looked for other issues.
Starting the MBP in clamshell mode, it found the monitor on DVI. Then restarting normally, it all worked fine, UNTILL the MBP went to sleep. when it awoke, no external. Plugged, unplugged, trashed display prefs, nothing, though it does still work via DVI-VGA.
I don't think having to clamshell everytime is a workable solution, but I NEED MY DESK SPACE!
Any thoughts?

Yesterday, having had the problem become far worse, I too tried PRAM/NVRAM clearing (SMC reset so many times I can't count them). Then, in desperation I purchased TechtoolPro 6 and ran it. Everything s working well now, and in fact the video issue cleared up while techtool loaded, it didn't even wait for me to run the thing!
More: About 3 weeks ago, I made a HardDrive image from an older white macbook so I could repair its hard drive. After doing that job, I (thought I) deleted the image from my MBP, but the disk still showed 80Gb used that wasn't before. So while I thought I had 130GB free, I was only showing 50. After running the directory rebuild, I now have 175gb Free! So the directory was keeping track of 95GB that WASN'T there! I suspect this had something to do with my problems. Then running the Defrag and Optimization routines, my 2007 MBP is running like a brand new machine. Other things that had been buggy (like the right click on my magic mouse) are now working like they should.
Recommended highly!

Yosemite will not allow external monitor connection

I have a 2008 MacBook Pro with a DVI port for an external monitor. I use it to connect to a Panasonic LCD projector to watch movies through my computer. I recently upgraded to Yosemite so I could use some new software, and now my computer won't connect to my projector. The computer recognizes when I connect the monitor to the DVI port, but does not show it as an available display in the Systems pane. I've read about all the graphics bugs with Yosemite, is one of those? Is it possible to use both Yosemite and continue to use my projector?

Hi SG Counselor,
If you're seeing no signal or getting no video on your external display, then I'd like you to follow the steps outlined below.
No video or no signal, image distortion, "snow," or flickering
Check connections
When using an external display be sure to check the following:
If you're using an Apple notebook, confirm the AC power cable or adapter is securely connected to the computer and the cable providing power to the display is also secure. It is always good to have your notebook connected to AC power when an external display is in use.
Confirm display adapters are fully seated in their respective connections and that they are supported models and for the computer and display. Refer to these articles to assist you with adapter compatibility and further configuration information:
Monitor and Display Adapter Table
About Mini DisplayPort to HDMI adapters
Apple Mini DisplayPort adapters: Frequently asked questions (FAQ)
Thunderbolt ports and displays: Frequently asked questions (FAQ)
Remove all display cable extenders, KVM switches, or other like devices and retest to determine if the issue is resolved.
Try unplugging the video adapter or cable and then plug it back in.
If more than one video adapter is in use (or "daisy-chained"), troubleshoot by using only one adapter.
Example: A mini DisplayPort to DVI adapter connected to a DVI to HDMI adapter is an unsupported configuration because there is a series of adapters in use.
If available, try using a different display and or adapter (or use a different connector by using DVI instead of VGA, for instance).
Reset the system
You can reset the Mac's parameter RAM and SMC.Reset the resolution
Start by resetting the Mac's parameter RAM. If the display does not come up, was previously set to an unsupported resolution, and still results in no video:
Start up in Safe Mode.
From the Apple () menu, choose System Preferences.
Choose Displays from the View menu to open the preferences pane.
Select any resolution and refresh rate that your display supports.
Restart your computer.
Using Closed lid, Extended Desktop, or Mirroring display modes
When using multiple displays, information can be presented in a number of ways. For more information and what modes are supported by your Apple product refer to:
Apple Portables: How to use your computer in closed lid (display closed) mode with an external display
How to use multiple displays with your Mac
Apple computers: Troubleshooting issues with video on internal or external displays - Apple Support
Take care,
Alex H.

Macbook pro(2008 later) can not recognise external monitor(NEC UXI2090) with mini-DP to DVI adapter with 9600GT

I bought mini-DP to DVI frome Apple several monthes ago and it worked well in that time until yesterday the external monitor show me no signal sign. Other PCs were connected with the same cable and monitor and they are fine. I am wondering there is something wrong in the adaptor or macbook pro. Furthermore I found the external monitor can display nornally when I switched to 9400 graphic card and used mini-DP to VGA adapter. If I switch to 9600GT no signal again. If I switch 9400 using mini-DVI, it is shown on the external screening: Out of range... In a word, In the mode of 9600GT, mac can not recognise external monitor(I can not detect it in the systerm preference even I press detect display buttun) and 9400 works in VGA mode. However when I connect adapter to mac, the screen showed blue flash.
I reseted SMC, no use; I created a new account or enter mac to safe mode, no use; so far I did not reseted PRAM beacuse of something wrong of my system. I am downlaoding Mountain Lion OS and will install it. Then I will reset PRAM and try again.
I do not know whether I shoud change the adapter or the single-link DVI cable to dual-link. Someone said it is useful in their condition. I tried some methods from BBS, such as connected when devices were off and then open, and so on. I failed.
Any suggestion for this problem?
Addition: OS: 10.7.4(Lion)

I turns out that the logic board of my MacBook Pro was faulty (despite being brand new).
I took it to the Apple Store, presented the problem, and one of the Tech's came to the same conclusion that I had -- hardware failure. Phone support was no help in the matter (and even told me that what I was trying to do wasn't a supported option, which is rediculous). However, the Genius Bar did take care of the problem, and my MacBook Pro was back to me with a replaced logic board within a few days.
Hope that htis helps.

MacBook Pro does not sense external monitor (Panasonic HDTV in my case) via thunderbolt-HDMI connection...Is update 10.8.3 helping anyone?

My MacBook Pro (newest model in 2013 so far) does not sense external monitor (Panasonic HDTV in my case) via thunderbolt-HDMI connection...Is update 10.8.3 helping anyone else who has this issue? I returned my multiple HDMI adapters after figuring out it had to be an Apple issue n not the adapters so I can't check it myself now.
Thanks!

I have late 2012 MBP 13" and connect to my Panasonic Plasma correctly.
But using the same cable, can't connect to an LG 47LM6200, the MBP detects the TV, the screen blinks blue, but the TV shows "no sinal detected" message.

T61 display problem on both Internal and External monitors

Hi,
I have Lenovo T61 of Type 7662, Model CTO. One month back the right hinge of my laptop has broken. Now the display on the screen is not at all readable. If I reboot the laptop, it is getting loaded, but the display on the screen is not readable and also it is displaying 4 windows without any clear visibility.
I thought the problem may be with the LCD cable under Right hinge. So, I tried to check this with an external monitor. But, the same problem is occurring on the external monitor also. So, I couldn't find what exactly the problem is. If anybody has this kind of problem, please help me on fixing this issue.
Thanks,
RamPap.

well the GPU issue is fixable under free repair, but given that your hinge is broken, not sure whether the free warranty applies in this case.
Basically you need a new motherboard.
Also, can you post a picture of the condition of the hinge? (upload it to tinypic or flickr, then link it here).
Regards,
Jin Li
May this year, be the year of 'DO'!
I am a volunteer, and not a paid staff of Lenovo or Microsoft

MBP Does Not Recognize External USB Devices

MBP does not "see" external USB devices (such as Garmin Nuvi GPS) or any thumb drive. No external USB devices show up in Finder nor does Disk Utility see them. No cable issues. Have tried restarting several times, but to no avail. This MBP used to recognize these USB devices, but no longer do so.
I have seen this question posed several times in forum, but no suitable answer. Don't know if it is H/W or S/W problem.

Hi Terry Temple
Is there at least any power going to the USB ports? ( as in if for example you plug in a USB light, will it switch on? )
If there is power in the USB ports it might be a software problem.
Try resetting the SMC see link: http://support.apple.com/kb/HT1411
also try re-set the PRAM see link: http://support.apple.com/kb/HT1379
However if you do not have any power at all it probably is a hardware problem.
Is it still under warranty?
Regards,
Andrew
Message was edited by: iddrew

T420 (4180-1G8): Problem with VGA output to external monitor

Hello,
I am trying to get the VGA output to an external monitor to work.
I am connected to my monitor directly using a standard VGA cable.
I am trying to enable primary display to the external monitor: I only get a black screen. The monitor says it is not receiving a signal.
When I try to clone or extend the display: same results.
Here is my setup:
Monitor: Iiyama ProLite E2710HDS
Operating System: Windows 7 Professional 64bit w/ Service Pack 1
Laptop: Thinkpad T420 (4180-1G8)
Graphics Adapter Info:
Intel(R) HD Graphics 3000
Report Date:            1/11/2012
Report Time[hr:mm:ss]:        10:27:8
Driver Version:            8.15.10.2538
Operating System:        Windows 7 Service Pack 1(6.1.7601)
Default Language:        English (United States)
DirectX* Version:        10.1
Physical Memory:        3979 MB
Minimum Graphics Memory:    64 MB
Maximum Graphics Memory:    1696 MB
Graphics Memory in Use:        88 MB
Processor:            Intel64 Family 6 Model 42 Stepping 7
Processor Speed:        2491 MHz
Vendor ID:            8086
Device ID:            0126
Device Revision:        09
*   Processor Graphics Information   *
Processor Graphics in Use:        Intel(R) HD Graphics 3000
Video BIOS:            2089.0
Current Graphics Mode:        1600 by 900
*   Devices Connected to the Graphics Accelerator   *
Active Notebook Displays: 1
    *    Built-in Display    *
Monitor Name:            ThinkPad Display 1600x900
Display Type:            Digital
Gamma Value:            2.2
DDC2 Protocol:            Supported
Maximum Image Size:
Horizontal:            12.20 inches
Vertical:            06.69 inches
Monitor Supported Modes:
1600 by 900 (50 Hz)
1600 by 900 (60 Hz)
Display Power Management Support:
Standby Mode:            Supported
Suspend Mode:            Supported
Active Off Mode:        Supported
Raw EDID:
00 FF FF FF FF FF FF 00 30 AE A1 40 00 00 00 00
01 14 01 03 80 1F 11 78 EA CC CE 99 58 50 8E 26
24 4B 53 00 00 00 01 01 01 01 01 01 01 01 01 01
01 01 01 01 01 01 F8 2A 40 9A 61 84 0C 30 40 2A
33 00 35 AE 10 00 00 18 CF 23 40 9A 61 84 0C 30
40 2A 33 00 35 AE 10 00 00 18 00 00 00 0F 00 A9
09 32 A9 09 32 19 09 00 06 AF 56 31 00 00 00 FE
00 42 31 34 30 52 57 30 32 20 56 31 20 0A 00 7B
Regards,
Stephane B.
Note: the external monitor works fine with my desktop computer and with a T400 laptop.
Solved!
Go to Solution.

Follow-up:
I have tried the latest "generic" Intel driver after completely uninstalling the device driver from device manager: without success.
I have tried another monitor from a different manufacturer: no luck.
To eliminate the device driver as a possible cause, I tried booting from an Unbuntu boot CD: no luck.
I have enabled boot display on the VGA port in the BIOS: screen remains black.
I am suspecting that the VGA port on my brand new Lenovo Thinkpad T420 is simply not working at all.
I have opened a call with my hardware support.
Regards,
Stephane B.

Macbook Pro(Mid-2014) Not Detecting External Monitor

Hi everyone, I'm trying to connect my MBP to an external monitor via HDMI. Since my MBP has an HDMI port built in, I'm not using any adapters between it and the monitor. But nothing is happening when I connect the HDMI cable, my MBP does not seem to detect it. I have tested my monitor with that HDMI cable on a desktop PC, and it all works without any issues there, so I reckon it must be something on the MBP end of the connection. But what could it possibly be? I have looked through forums and read countless threads about external display problems, but have not found any info that could identify the problem. I have tried booting my MBP and/or turning on my monitor before and after connecting the HDMI cable, and there was never even a hint of detection.
I'm running OS X Yosemite 10.10.1, and the external monitor in question is an HP Pavilion 27Xi in 1080p.

I have a problem connecting external display (Dell U2311H) to my 13" MacBook Pro (Early 2011).
I use Tecklink Mini DasplayPort to HDMI adapter (http://www.techlink.uk.com/products/wires_cables/wiresmedia/wiresmedia_media/wir esmedia_mini_displayport_plug_to_hdmi_plug), but since U2311H doesn't have HDMI input, I also use Manhattan DisplayPort to HDMI Adapter (http://www.manhattan-products.com/en-US/products/8101-displayport-adapter).
And nothing.
The display is not detected, no picture or even external monitor presence at all.
I even reset PRAM, and installed 10.8.2 Supplementary update.
I also plugged and unplugged all I could, with no luck.
As I can see on Apple discussion, it is a common problem with 2011 MacBook Pro's.
It seems like the problem is in Thundebolt port, it somehow does not work properly.

MBP (rev 1.1) external monitor question

I am thinking about buying an external monitor (in the 20-24 inch range) to hook to my first generation MBP. My eyes are tired of staring at the smaller screen for big projects and the extra real estate would be nice at home. Maybe a silly question, but just wanted to be sure the ATI Radeon 1600 (256megs of vram) has ample power to run a large LCD. I am assuming it shouldn't be a problem, but would be interested in input from others. Not a gamer so no worries there but, I want it to look good and still feel as responsive as it does with the built in screen.
Thanks for any input. Suggestions on a monitor are also welcome.

Your MBP (and mine) +"Simultaneously support full native resolution on the built-in display and up to 2560 by 1600 pixels on an external display."+
Meaning yes, you can drive a large monitor with no problem.

Problem with T61 and DVI External Monitor (via Advanced Mini-Dock)

Ever since I upgraded to Vista SP1 on my ThinkPad T61 (with an Intel integrated 965 series graphics card), I've been having problems when I try to use an external monitor via the DVI port in my Advanced Mini-dock. I'm curious if other people have experienced this problem.
The problems surfaces when I first boot up, or sometimes after my ThinkPad has been running for awhile (particularly when I do something graphics related, such as right-clicking to open display properties). The picture starts to flicker (or disappear and reappear, like the screen does when changing graphics resolutions). I also hear the "ba-bum" sound that you hear when disconnecting a piece of hardware, followed by the "bum-ba" reconnection sound - these two sounds happen repeatedly (sometimes as fast as once per second). If I don't do anything, sometimes I'll get a bluescreen.
Not long ago, I found a fix of sorts: to stop the flickering/reconnecting, I just open Task Manager and stop the process called "igfxpers" (an Intel driver problem). The problem always disappears after I do this, although I have to remember to do it every time I reboot or else the problem comes back. So it's not an ideal fix.
This problem doesn't happen when I connect an external monitor using the analog VGA port, or when I'm just using the notebook LCD. It's limited to just the DVI connection. I've tried two different digital monitors (one LG, the other BenQ) as well as two DVI cables - the problem is still the same. So it seems like a driver problem of some sort - unfortunately, the Intel drivers haven't been updated since last February.
I should also note that I've tried reinstalling my OS two or three times, and the problem always comes back. Has anyone else had this problem, and is a fix on the way?

Error Message:
Input signal out of range. Translation:
You will see this on an otherwise blank screen. Assuming that the data cable is plugged in correctly, the video card is feeding the monitor a signal stream in excess of what the monitor can accommodate. The two main causes for this are that the user has set either the resolution or the vertical frequency rate too high. For example, you might set a new graphics card to display at 1,280 x 1,024, but if the monitor is only capable of 1,024 x 768 resolution, you’ll get a Sync Out of Range error. This is especially common in 14-inch monitors.
Solution:
Because you obviously can’t make settings changes from within regular Windows, you’ll need to reboot into Windows Safe Mode. When you restart the system, there is a point during boot up when the system switches from reporting diagnostics and detected components to loading Windows. This point is usually accompanied by a beep and the screen going black. Just before this point, you want to start repeatedly pressing the F8 key. This should bring up a menu of Windows boot options. The one you want to pick is Safe Mode.
From Safe Mode right-click the Desktop and select Properties. Go to the Settings tab and use the slider to drop your resolution a notch or two. Reboot and let Windows try to go into Normal mode. If this still doesn’t work, go back into Safe Mode and get to the Settings tab of Display Properties. Click the Advanced button, go to the Monitor tab, and check your refresh rate. The lowest advisable rate is usually 60Hz, although this works better for LCDs (liquid-crystal displays) than CRTs (cathode ray tubes). Apply the change and reboot.

My imac will not detect external monitor after recent update. Is there a way to fix this?

I have a VGA monitor plugged in to my imac using the VGA adapter to the mini-DVI. All was working well. Since I updated over the weekend, the computer will not detect the monitor.
Any ideas how to fix this?

Pcantin wrote:
I have tried another VGA monitor and that failed as well. Since you don't think the update was the cause, it may be that the adapter I am using decided to call it quits. I will see if I can find another and test that out.
I will look into the external drive idea as well.
Thanks for your help on this.
I didn't think about the adaptor, but you should at least visually inspect both the adaptor and the cable at both ends. If one or more pins got bent even slightly the connection might fail. The cables can also fail internally. Replacing the adaptor and cable may be the quickest thing to do initially. If you want to try to save money, first replace the adaptor, and if the problem persists, then go replace the cable (or vice versa).

MacBook Pro 2011 does not detect external monitor

I have a MacBook Pro 13'' early 2011 runing Lion 1.7.2.
I have an HP v185ws external monitor connected via an Apple Thunderbolt to VGA connector.
Since last month's Thunderbolt firmware update, my external monitor is no longer detected.
Does anybody has a solution to this problem?
Thanks.

I have a problem connecting external display (Dell U2311H) to my 13" MacBook Pro (Early 2011).
I use Tecklink Mini DasplayPort to HDMI adapter (http://www.techlink.uk.com/products/wires_cables/wiresmedia/wiresmedia_media/wir esmedia_mini_displayport_plug_to_hdmi_plug), but since U2311H doesn't have HDMI input, I also use Manhattan DisplayPort to HDMI Adapter (http://www.manhattan-products.com/en-US/products/8101-displayport-adapter).
And nothing.
The display is not detected, no picture or even external monitor presence at all.
I even reset PRAM, and installed 10.8.2 Supplementary update.
I also plugged and unplugged all I could, with no luck.
As I can see on Apple discussion, it is a common problem with 2011 MacBook Pro's.
It seems like the problem is in Thundebolt port, it somehow does not work properly.

MacBook Pro Mid2012 does not detect external monitor

After i upgraded to MAVERICKS now using my " BELKIN HDMI TO THUNDERBOLT ADAPTER "
when i connect it to TV the monitor flashes black and nothing happens no signal on TV go to settings display and sound there is nothing and when i disconnect HDMI it flashes black again ,,, help please ..
i doent know if its from MAVERICKS OR HDMI CONVERTER OR SMT TV OR THUNDERBOLT PORT

I have a problem connecting external display (Dell U2311H) to my 13" MacBook Pro (Early 2011).
I use Tecklink Mini DasplayPort to HDMI adapter (http://www.techlink.uk.com/products/wires_cables/wiresmedia/wiresmedia_media/wir esmedia_mini_displayport_plug_to_hdmi_plug), but since U2311H doesn't have HDMI input, I also use Manhattan DisplayPort to HDMI Adapter (http://www.manhattan-products.com/en-US/products/8101-displayport-adapter).
And nothing.
The display is not detected, no picture or even external monitor presence at all.
I even reset PRAM, and installed 10.8.2 Supplementary update.
I also plugged and unplugged all I could, with no luck.
As I can see on Apple discussion, it is a common problem with 2011 MacBook Pro's.
It seems like the problem is in Thundebolt port, it somehow does not work properly.

FCP Problem with Firewire output to external monitor and speaker ???Help

i have a g5 powermac. the problem is when using Final cut pro 4hd. when i output my work through firewire to my external monitor and speaker i have a problem with the audio signal. Theres feedback/noise/hiss from the speakers. The firewire connects to DSR-11 vtr deck which feeds my monitor and speakers. it only happens when in FCP is set to A/V firewire output. does not happen if Video output is not set to firewire.
I Diagnosis is that it is not my dsr-11 deck or firewire i've ruled those out. The problem is either FCP software or Hardware problem with my G5
Does anyone have a similar problem. please respone, i will try to answer any respones,
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powermac g5 powermac

CaptM
From the firewire that feeds the dsr-11. on the output, i use s-video cable to my monitor (sony pvm-14l) and High Quality rca cables thet feed the audio to the Roland Speakers.
I've changed all wires and still have audio problem. I,ve changed my Dsr-11 deck to my camcorder and still have the problem.
If any of u guys use FCP The problem happens When I select view> external Monitor > and select firewire for Audio/ and video. I have never changed my editing habits, something just went wrong with the signal, I think its a Hardware problem with the firewire connection. I'm Going to have to bring this to a Apple Service Center In my local area one day.

Problem: MBP Is not allowing external monitor Widescreen resolutions.

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