Monitor VGA not recognizing

My PowerMac G% will not recognize any of 2 working VGA monitors and and 1 Flat screen LG TV. VGA cable (new) into correct input on rear of TV.
Computer monitors act like the are in sleep mode until u disconnect included apple VGA-DVI adaptor ,then screens come on blue but no signal from Mac
Help Please

Hmmm, long shot...
Safe Boot from the HD, any display?

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My monitor is not recognized correctly before I'm logged in.

I have a Dell U24H14 monitor. Connected with a Mini DP to DP port cable.
In preferences I've set the monitors to extends. Not duplicate. This is al working just fine.
BUT:
When I boot my MacBook, with the monitor connected, half way during the boot process, when the monitor is being recognized by OS X, it goes to the standard setting, which is duplicate the screens.
I've tried with other monitors, but they all are on extend at the login screen after boot.
I think that somehow the settings(extend) of the monitor are not loaded before I login. Or the settings only apply to my user account and not to the root user.
I've tried:
- Reset NVRAM
- Reset SMC
- Factory reset Dell Screen
I have to try with HDMI, maby that works, but I do NOT want to use HDMI.
How can I fix this? I really love the screen but it is getting annoying when I boot.
Any help is very appreciated.

You should set the Unattended Execution Account if you don't want to set credentials for data sources.
Kind regards,
Margriet Bruggeman
Lois & Clark IT Services
web site: http://www.loisandclark.eu
blog: http://www.sharepointdragons.com

Apple monitor not recognizing keyboard

My 7 day old Apple 23" monitor is not recognizing my 7 day old Apple keyboard (hardwired, not wireless). I am using a MacBook Air. All was fine until last night.
Suggestions?
Thanks!
Elizabeth

Some similar things but not many. I have not changed anything in the computer. Update , I did borrow a VGA to VGA cable was able to get this to work. But for the life of me I cannot get a signal from the Displayport. Also I tried a Displayport to DVI-D cable with no results. I would like to use a digital signal rather than an analog. Maybe I will try to update my Bios.
Thanks for your reply. Anybody else had this problem?

S5610y monitor not recognized

Have a Slimline s5610y that the monitor is not recognized by the computer. I have tested monitor with another computer, monitor is good. I have tried another monitor with the s5610y and still not recognized. I have tried VGA and DVI, nothing works. I know hard drive comes on, I can hear it power up and go through the motions without capturing the monitor. Any suggestions?
Thanks in advance.
wpooh65

Hello wpooh65,
Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I understand that you have tried 2 monitors on your HP Pavilion Slimline s5610y Desktop PC and neither work, but they do work on another computer. If you see absolutely nothing from the computer when they are connected I think it would be best if you contacted HP technical support for repair options.
US support link to contact options for HP products purchased in the US.
Outside of US support link to contact options for HP products purchased outside the US.
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Yoga Pro 2 - Display not recognized in windows (Driver or Hardware issue?)

Out of warranty by a month!
Yoga Pro 2 - 256gb, installed new wireless card a month ago. Windows 8.1
The touchscreen still works while the screen is black.
System restarted after sleep mode I think.
The Lenovo logo is displayed, seems to load windows, but when windows loads (I don't see it load so this is an assumption) the screen blanks and the black light is on.
I can connect an external monintor which will connect after a return from sleep mode(odd). Which then turns the backlight off.
When on the external monitor the internal display is not even recognized by windows.
When I boot in safe mode, the internal screen works fine with of course limited capability.
I have reloaded display drivers from the support site.
Right now my internal monitor is not recognized by windows and is dark, and I can use an external monitor.
Anyone have any clues as to what my be going on? Hardware, driver etc???
What information can I provide?
Solved!
Go to Solution.

This is a pretty weird issue with conflicting observations.
1) Screen works in Safe Mode but not in regular boot. (So, not hardware issue)
2) Display works on external monitor in regular mode. (So, not drivers issue)
Did you install the wireless card yourself? Did you unplug the display cable while installing the card?
Could you re-open and check that all connections are good?
Is the Wi-Fi card working well?
I would also recommend a complete reset of the laptop to eliminate the possibility that this is a corrupt driver. You can use the NOVO button to reset your laptop. Make sure to make a backup on external drive for your personal files.
Current System - Lenovo Y510P, GT755M SLI, 8GB RAM, 1TB HDD + 24GB SSD
When your plans fail, your Real Story begins!!

Monitor not recognized by Mac anymore?????

Hi
This is big and what is APPLE doing to solve this issue??
I just copy some posts from the forum to show how big this issue is, there is 8 more pages with the same problem, and i am one of them!!!!
HELP!!!! WE ARE FREAKING OUT HERE AND NEED A SOLUTION!!!
Yes, me. I have an HP w2207 who worked with my 3 y.o. old MacBook (OS 10.4.??) via the DVI-port flawlessly. Then bought a brandnew MacBook Pro with 10.6.X and the external monitor stopped being recognized. It works now that I have changed the connection to the VGA-port of the monitor (and bought yet another adapter for the MacBook Pro) but the quality is not what I'm used to.
MacBook Pro Mac OS X (10.6.1) HP w2207 external monitor
MattLTH
Posts: 15
From: Salt Lake City, UT USA
Registered: Dec 4, 2007
Re: External monitor not recognized!
Posted: Dec 1, 2009 1:29 PM in response to: cruzcj
Reply Email
Yes. I've tried 7 different Macs including a MacBook Pro with Snow Leopard (10.6.2) and my external monitor doesn't work with it either.
For me here's a recap:
Installed SL on a Mac Pro connected to a 23" Cinema via DVI and Olevia 537 via HDMI Input #1 and now that input no longer works with Mac computers.
Reinstalled 10.5.8 on the Mac Pro and HDMI #1 still didn't work, so I plugged the Mac into HDMI #2 and it worked.
Reinstalled SL on the Mac Pro connected to a 23" Cinema via DVI and Olevia 537 via HDMI Input #2 and now that input no longer works with Mac computers.
Since then, every device (PCs, DVD Players, Video Cameras, etc...) I connect to either of the HDMI inputs work fine. However, neither HDMI input works with ANY of the 7 different Macs (regardless of OS version) I've tried, except for a 10-year-old G4 running Panther or Tiger.
The monitor had previously worked with the MacPro (HDMI input #1) and a G5 (HDMI input #2) for almost 2 years.
When I plug the MacPro into any other monitor via HDMI, it works fine. Same thing with the G5.
My theory is still that the installer for Snow Leopard somehow made my monitor's HDMI inputs incompatible with Macs. I'm so frustrated that I'm ready to buy a new monitor, but since there's no guarantee that a new monitor won't be adversely affected by Snow Leopard, I'm still dubious.
Matt
MacPro, MacBook Pro, PowerMac G5 Mac OS X (10.6.2)
Stephen Darling...
Posts: 59
From: London, UK
Registered: Sep 24, 2004
Re: External monitor not recognized!
Posted: Dec 5, 2009 8:22 AM in response to: Roger Kaufmann
Reply Email
Another "me too" post...
Not sure exactly when it stopped working (since I don't use it every day) but my Viewsonic VX2455wm stopped working with my MacBook recently too. Checked with another MacBook (six months newer than my Late 2006 model) and that exhibited the same problem. Both machines have fully patched Snow Leopard installs. Both started with Tiger. Mine is regularly connected to the external monitor, the other has never been connected. I'm connecting using a DVI cable and a mini-DVI-DVI adapter.
The monitor appears to work correctly. I've checked with a Windows laptop connected on the VGA port. I want to test with another DVI-enabled machine to see whether or not its the cable.
MacBook C2D 2Ghz Mac OS X (10.6.2) iPhone
cruzcj
Posts: 4
From: California
Registered: Nov 28, 2009
Re: External monitor not recognized!
Posted: Dec 13, 2009 10:38 PM in response to: Stephen Darling...
Reply Email
My wife's 15" MBP arrived on Wednesday. Connected it tonight to her new Dell 23" ST2310 via a MiniDisplayPort to VGA and it works fine.
MacBook Pro 15" 2.8GHz Mac OS X (10.6.2)
Gaston55
Posts: 4
From: Sweden
Registered: Dec 15, 2009
Re: External monitor not recognized!
Posted: Dec 15, 2009 12:06 AM in response to: Roger Kaufmann
Reply Email
Hi Guys
I have the same problem with my new Dell 2209WAf. It worked fine before i changed from L to SL.
I didn't know what happened so i have spend hours and hours to resolve the problem.
Hours with Mac support and friends didn't change anything, i still cant make my Dell to work, or show up in preferences. I am working as a photographer and this issue is a real problem.
I just heard from Mac Support that Apple is working on it.....well, doesn't help us with the problem today.
So Apple, DO SOMETHING ABOUT THIS! NOW! this problem should NEVER showed up, this is something you should have fixed before telling all the Macers to upgrade!!!
Macbook Pro Mac OS X (10.6.2)
RWildman465
Posts: 2
From: Illinois
Registered: Dec 16, 2009
Re: External monitor not recognized!
Posted: Dec 16, 2009 1:18 PM in response to: Gaston55
Reply Email
Experiencing the same issues. However, on bit different hardware.
I'm using the XLR8 ProView USB input devices. Using these devices on a mixture of 10.5.8 and 10.6.2 systems (2 MacBooks, 2 Mac Mini and 1 iMac).
I can confirm the following:
When attempting to mirror video, or extend the desktop, using a mini-DVI to S-Video/Composite device on OSX 10.6.2 no video is sent to the mini-DVI device (inputing into the XLR8).
When attempting to mirror video, or extend the desktop, using a mini-DVI to S-Video/Composite device on OSX 10.5.8 video is sent to the mini-DVI device (inputing into the XLR8).
Let me also state, that the mini-DVI port on the Mac Mini's do work. They have been connected to 19" monitors and working without issue. Today, the mini-DVI devices were replaced with minidisplay port devices, which are use in conjunction with the mini-DVI ports.
It would appear, in my case, that the problem is that the mini-DVI port on both the MacBook and Mac Mini, running 10.6.2, as a secondary display device is not operating properly.
iMac Mac OS X (10.6.2)
Todd Camp
Posts: 2
From: Chicago
Registered: Dec 19, 2009
Re: External monitor not recognized!
Posted: Dec 23, 2009 12:41 PM in response to: RWildman465
Reply Email
Same problems here. I reloaded OS 10.4.6 which is what shipped with my MBP1,2 17" 2.16 Intel Core Duo 2GB ram and after installing that, i was able to select 1920x1080 for my external HP w2338h, DVI-VGA, never been able to connect DVI-HDMI. On SL, the max rez I was able to "use" was 1600x1200 which looked horrible. So this leads me to suspect that this must be an issue with SL.
I spoke with Apple Tech support on Sat and was no help. The only suggestion was that I take my MBP and Monitor to the Apple Store. Those of you who are fortunate enough to live in Chicago in the winter, then you know that option really isn't that feasible, it is but just a giant pain.
Early 2006 MBP 17" Mac OS X (10.6.2)
Salm0n
Posts: 1
From: Minneapolis
Registered: Dec 27, 2009
Re: External monitor not recognized!
Posted: Dec 27, 2009 9:57 AM in response to: Todd Camp
Reply Email
I have an iMac 9,1 Intel Core 2 Duo that I bought last June. It came with Leopard, but I upgraded to Snow Leopard. Currently, it's running 10.6.2. My HP w2207 Widescreen monitor works perfectly with it using the DVI port on the HP and the mini-display (not mini-DVI) port on the iMac.
However, I just bought the top-of-the-line iMac 11,1 Intel Core i5 QuadCore three days ago and it crashes nearly every time that it wakes from "sleep" when the HP w2207 is connected to it. It doesn't even recognize that the w2207 is connected to it. Additionally, when the w2207 is connected, it (a) looks terrible - very dim and very granular, and (b) causes the iMac QuadCore to operate very sluggishly. When I disconnect the HP w2207, the iMac QuadCore is lightning-fast.
Much like my older iMac, the QuadCore is running 10.6.2 and I'm using the mini-display port.
iMac 11,1 & iMac 9,1 Mac OS X (10.6.2)
Marjorie Colletta
Posts: 20
Registered: Mar 17, 2005
Re: External monitor not recognized!
Posted: Jan 6, 2010 6:07 PM in response to: Roger Kaufmann
Reply Email
This is a Me too post, I have a MacBook and NEC Multisync Monitor that worked fine before I upgraded to 10.6.2. I've tried to get it to work without any luck. I've written NEC to see if they have a solution.
MacBook 2 GHz Intel Core 2 Duo Mac OS X (10.6.2)
davej147
Posts: 12
Registered: Jun 1, 2006
Re: External monitor not recognized!
Posted: Jan 11, 2010 6:24 AM in response to: Roger Kaufmann
Reply Email
Another me too post. I have a new 17" MacBook Pro with 10.6.2 installed. Trying to connect to an HPL2245wg - sometimes it works flawlessly - other times not at all. Some mornings I spend 30 -40 minutes rebooting, unplugging and plugging the monitor, Detecting Displays, changing the Graphics Card (Energy settings) - all to no avail. Very, very frustrating Apple - please figure out what is going on with this issue....and get it fixed!
17" MacBook Pro Mac OS X (10.6.2) Very happily gave all my XP-stuff away!
Anteck
Posts: 2
From: Australia
Registered: Sep 30, 2009
Re: External monitor not recognized!
Posted: Jan 20, 2010 2:31 PM in response to: Roger Kaufmann
Reply Email
Wow, me too. Did a minor software update (apple released it) last night, got on this morning and BANG - my main 24" Dell display is NOT working.
This is ******, apple have surely f**ked up here. It's never had a hitch, ever, since i bought it 9 months ago.
We are all reporting the same thing - software update, and then no working external display...
APPLE???
Macbook Pro 2.2 15" Mac OS X (10.6.2)
Zedog
Posts: 13
Registered: Aug 10, 2006
Re: External monitor not recognized!
Posted: Jan 20, 2010 2:59 PM in response to: Roger Kaufmann
Reply Email
I seem to have found a fix for myself. I was having terrible issues with the screen blinking and flickering constantly. I tried to reset the SMC with everything unplugged and the computer would not reboot at that point on it's own which led me eventually to reinstalling SL.
Reinstalling SL is quite painless actually as it installs on top of your profile. After reinstalling I ran software update which installs the cumulative upgrades. Now I usually don't have any problems but must follow the instructions to run in clamshell mode to the letter.
After a week of running in clamshell mode I started having an issue with the dock not lining up so I put the computer to sleep, disconnected the monitor and restarted with nothing connected. After that, followed the clamshell mode instructions again and have been working fine again all week.
I've also disabled my screen-saver, and deleted the windowserver preferences as part of my debug process but not sure if that has contributed to my new found stability.
http://support.apple.com/kb/HT3131
Mac OS X (10.6.2)
pragmaik
Posts: 2
From: Duisburg
Registered: Apr 16, 2008
Re: External monitor not recognized!
Posted: Jan 21, 2010 1:08 AM in response to: Roger Kaufmann
Reply Email
Me too. I have a MacBook Pro 2,2 running the latest Snow Leopard 10.6.2. After I have installed yesterday's security patch it does not recognize external displays on the DVI port any longer. Tried it with a 23" DELL at the office and a 23" Samsung at home. Both have worked without any problems for years.
I am curious to learn how this behavior is related to security...

Gaston,
This is not the correct Feedback venue for your issue.
Please select an appropriate product from those displayed HERE and use the corresponding form to communicate to the correct department.
ali b

HDMI disconnected and monitor not recognized [SOLVED]

Hallo guys,
I run a desktop with an ASUS motherboard and an ATI video card.
I have two monitors, the first is connected by DVI and is properly workling, the second accepts DVI or VGA, then I used a VGA-HDMI adapter to plug it into the HDMI port of my graphic card.
But the monitor is not recogized and is in stand-by, waiting for a signal.
I connected the same monitor+vga+hdmi connector to my VAIO laptop (also Arch running) and it works.
Could anyone help me?
Thanks.
Last edited by Astroarch (2014-09-11 08:15:28)

Try another adapter, booting up with the monitor turned on or simply fake a monitor connection on the vga side and see if it is recognized, similar to this (at your own risk obviously).

N570GTX M2D12D5 Dual monitor not recognized

N570GTX M2D12D5
Windows 7 64 bit
Two monitors connected to DVI outputs
Second monitor not recognized by Windows 7 or NVIDIA Control Panel
Not found by Rigorous Display Detection either.
Does something else have to be set to get this card to enable 2 displays?
MMc

remove current vga drivers in safe mode with >>Driver Sweeper<<
then install 270.51 from nvidia web page and see how its goes

Macbook not recognizing USB ports from external monitor.

I have a Dell Monitor hooked up to the VGA port and have several items (printer, external hard drive) hooked into the ports on the Dell monitor. My Macbook is not recognizing the things that are plugged into the monitor.
These ports were working at one point but when I moved my setup and had to plug everything back in I can't get the USB ports on the monitor to work.
Along the same lines...I tried connecting the monitor to my laptop with a USB cable (female port from back of monitor to male port on Macbook) along with the VGA port. This did not fix the problem but I just wanted to know (had my laptop been recognizing the ports) if this was even necessary.
Since this setup has worked before I'm thinking it is something small that I am missing but any help would be appreciated.
Macbook Pro Mac OS X (10.4.7)

Hi,
Please go to the following site and click Scan now:
http://h10025.www1.hp.com/ewfrf/wc/softwareCategory?os=228&lc=en&cc=us&dlc=en&sw_lang=&product=31841...
Hope this helps.
BH
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Make it easier for other people to find solutions by marking a Reply 'Accept as Solution' if it solves your problem.

External monitor not recognized (X200)

Hi,
I have an X200 with Vista
When I connect an external monitor (or projector) it is not recognized. Shift-F7 results in a message that no external monitor is detected. However, if I leave the monitor connected, put the system in standby and then resume, it recognizes the external display.
Any thoughts to how I can get it to recognize without this work-around? Thanks

I had the same problem. I think it's a vista device driver issue. Try this-
Power down your laptop. Plug in the external monitor. Boot the computer - it should default to the external monitor, and Windows should recognize it. Then, shut down normally.
Pull the monitor cable, boot your laptop regularly, reattach the cable, and give it a try.
It worked for me.

External LG monitor not recognized by MBP

I've been using an LG Flatron L22WTG external monitor with my MBP (purchased 2011) running 10.7.2. The monitor worked fine until recently and now is not recognized by the MBP and goes into "power saving mode". There is no response when I press "recognize monitors". Tried the settings for power saving and monitors. This issue is recent, but I don't know if it occured with my recent installation of the last Lion patch.

Me too, but my LG monitor just stopped working after I installed the recent "Thunderbolt Firmware Update".
Literally the monitor was working yesterday. This morning I installed the update and now it's broken. Great update.
Anyone have a fix?

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

Mini not recognizing monitor

I have a late 2009 Core 2 Duo/2.53GHz Mac Mini.
My old 24-inch LCD monitor was having problems so I had to send it for repairs. I have a 22-inch Samsung and 17-inch Samsung that I have tried connecting to the Mini and both come-up blank upon booting.
First tried the 22-inch using the Mini-DVI to DVI adapter connected to the monitor DVI; no luck. Then tried the same monitor with a Mini DisplayPort to VGA adapter connected to the monitor VGA. Still no luck.
Then I tried the 17-inch using the Mini DisplayPort to VGA adapter connected to the monitor VGA. It still comes-up blank.
Both of these monitors work when hooked-up to my IBM laptop.
Looks like the Mini is not detecting the monitors. How do I force it to see the monitor? I'm flying blind here.
Please help.

mh.. whenever i connected another display to my mini, it took some time for the mini to detect it. if it took to long, i turned the monitor on and off several times, while connected to the mini and suddenly it was detected.
another thing you can try, is to reset PRAM. (holding cmdalt+PR while booting until third chime). that should reset the resolution, if resolution is a problem here.
Message was edited by: dirkt68

TV not recognizing VGA input

I have this TV hooked up to my Arch machine and whenever I run xrandr the computer sees the output. The problem is, the TV is not recognizing any input so I can't change into VGA. Arch even detects the correct resolution and when I hook up a Debian machine it displays image with no problem.

Look into your TV manual for the supported resolutions
I had a experience a while back with a TV at my wife parents place where xrandr said that 1980x1080 (fullHD) was a supported resolution, but the screen just went blank. When I consulted the manual, I found out that the maximum supported resolution was in fact, 1366×768 (WXVGA), which worked almost perfectly (there was a missing pixel column on the right side, not too much of a trouble).
Short version: Check the TV specs, xrandr sometimes lies.

External monitor not recognized after upgrading to win 10

After upgrading to Windows 10, my external Samsung monitor isn't recognized. Not sure if I need new drivers from HP or Samsung (they say they don't have anything for me, of course).

Hello I managed to solve my problem of brightness key not working by Installing the Intel HD Graphic 3000 Driver from Intel official site. So if your Graphic card is Intel HD 3000 Graphic and your system is 64 Bit OS then you can follow the below link to download it and install.....https://downloadcenter.intel.com/download/24971/Intel-HD-Graphics-Driver-for-Windows-7-8-64-bit Note :- This Graphic driver only support the following intel Processor And If Your Are still running the built in intel graphic card, then only download it and install at you own risk.Supports Intel(R) HD graphics on: 2nd generation Intel(R) Core(TM) i3 processor 2nd generation Intel(R) Core(TM) i5 processor 2nd generation Intel(R) Core(TM) i5 vPro(TM) processor 2nd generation Intel(R) Core(TM) i7 processor 2nd generation Intel(R) Core(TM) i7 vPro(TM) processor Intel(R) Pentium(R) Processor 900/B900/G600/G800 Series Intel(R) Celeron(R) Processor 700/800/B700/B800/G400/G500 Series

Monitor VGA not recognizing

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