10.7.3 external monitor "input not supported"

I have an external monitor connected with the Aplle VGA adaptor to my MBP.
It has been working fine for the last year.
Today I installed 10.7.3
And now I get the message "Input Not Supported" on the external display.
Not impressed.
Any ideas or do I have to roll back this update.
Cheers.

OK now it gets silly.
I have also had a problem, since I instaled Lion, that when I open my MBP the screen is black and no amount of encouragement will bring it to life.
So, I have to switch on my external monitor. My deskptop thern appears on the externam monitor, so I select "Detect Displays" from the menu bar and, kazam, my MBP screen comes to life and the desktop moves there.
It only remains for me to switch off the external monitor and wait for Apple to provide a fix.
Now, remember my current problem, in that the external monitor wil not work and shows "input not supported".
So today I opened my MBP and sadness, the screen is BLACK. So I switched on my external monitor and WAHEY! it worked and the desktop appeared on the external monitor.
Excited at the prospect that my problem had somehow magilcally fixed itself overnight, I selected "Detect Displays" and my MBP screen duly appeared and the desktop meved there.
The external monitor then stopped working and showed the message "Input Not Supported"
I also have a related VNC problem that is still outstanding, so I think it is fair to say that there are several issues around external monitors with Lion.

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Rage 128 Pro and HP Monitor= 'Input Not Supported'. Need help.

I recently purchased this monitor for my Mac G4 (Digital audio model with Rage 128 Pro);
http://www.macmall.com/macmall/shop/detail.asp?dpno=7246171&Redir=1&description= HP-Smart%20Buy%20w19%2019-inch%20LCD%20Widescreen%20Flat%20Panel%20Monitor-Monit ors
When I power up the Mac I can see the apple logo as OSX starts to boot but soon thereafter I get a black screen with a little floating window that says, 'Input Not Supported'.
What does this mean in technical terms and do I need to return the monitor?
Thanks.

Hi-
The monitor is telling you that the input being received is not supported. This is because the rage 128 is too weak a graphics card to drive the HP Monitor ( or any LCD over 17" for that matter).
You will need a better graphics card to run the display.
As for which graphics card, basically, most any 4x AGP Mac compatible card +other than+ the Rage 128 (or Pro) will work to drive the monitor.
http://hardcoremac.stores.yahoo.net/memory3.html
http://www.welovemacs.com/agpvideocards.html
http://eshop.macsales.com/shop/video/hardware/

DVI to VGA adapter, monitor says "input not supported"

I have just received my MBP yesterday and, when I attempted to attach it via DVI to VGA adapter to my Acer AL2016W flat panel LCD, the monitor told me "input not supported". I was under the impression VGA is VGA is VGA. Perhaps I am mistaken. There is no DVI port on this monitor so I am, essentially, screwed ATM unless I purchase yet another monitor - this one is less than a year old. I require my MBP to be attached to an external monitor due to a disability, and am not sure what to do. I don't believe it to be an isolated issue, especially after viewing some of the other posts about the graphics card being an issue as well. I wish Apple would come forward with a resolution. I realize this issue has probably been posted somewhere already, however I am unable to sift through all the posts due to the aforementioned disability and inability to attach to external monitor. I just can't sit here for that long, so I offer my apologies.

First off, are you connecting in the proper sequence? That is:
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In that way, the MBP should autodetect the monitor and set the resolution appropriately. Else, the output resolution of the MBP may not suit the monitor, and the monitor will give a "not supported" error.
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http://support.apple.com/kb/HT3131
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I was in my mac mini playing with the display settings and I clicked on one that was way to big for my monitor. Now its not coming up at all. I can see the screen when it boots up, however when it gets to the OS, the screen goes to a blank black screen and says "Input Not Supported" Please Help. I just got this 4 days ago.

I believe the easiest way to recover from this is to boot into safe mode.
http://docs.info.apple.com/article.html?artnum=107393
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Hello @Bjenkins,
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 have read your post on how your external monitor will not display full view Microsoft applications on your system, and that certain functions will not work on your desktop. How long ago did your applications work properly? I would be happy to help you, but first I would encourage you to post your product number for your computer. Below is a is an HP Support document that will demonstrate how to find your computer's product number. In addition, it will also help if you indicate which operating system you are using; and whether your operating system is 32 or 64 bit. The more information you can provide, the better!
How Do I Find My Model Number or Product Number?
Which Windows operating system am I running?
Is the Windows Version on My Computer 32-bit or 64-bit?
Please re-post with the necessary information, this way I will be able to research this further for you. I look forward to your reply!
Cheers!
MechPilot
I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the right to say “Thanks” for helping!

I have acer al1916w and i have a problem message that say input not supported help

i have acer al1916w and i have a problem message that say input not supported help

under windows 7 - 8.1right click on your desktop and choose screen resolution set a very basic resolution like 1280x1024 @ 60Hz (frequency can be set under advanced options); you need to have a working monitor to set this and then reboot connecting your al1916w. if it still gives you that message, can be a bad cable or some hardware monitor issue.

Acer AL 707: "Input not supported" - What can I do?

Hello everybody!
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Intermittent "Input Not Supported"

A few days ago picked up a Mac Mini to make into a video server. I have it currently hooked up to my old PC's LCD monitor (17" Envision cheapy from when LCDs first became affordable 5 or so years ago) while I work on converting my DVD collection to it.
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Since I have up dated my Macbook pro, my external monitor does not work. Who can help me

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Try a safe boot.
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Start Windows XP in safe mode. Press the power button and then begin tapping the F8 key before Windows boots up. Choose Safe Mode with command prompt. While in safe mode, start system restore by typing rstrui.exe and pressing enter. Choose a restore point dated before before the initial problem began. This may resolve the issue. If it does, fantastic. If not, then continue with the troubleshooting as described below.
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Don't forget to post your result here in your thread.
Best regards,
erico
****Please click on Accept As Solution if a suggestion solves your problem. It helps others facing the same problem to find a solution easily****
2015 Microsoft MVP - Windows Experience Consumer

External monitor will not sleep using 2012 MacBook Air and HDMI adapter

I am running a HP 27xi (27" display) using the apple thunderbolt to HDMI adapter, and using a HDMI cable.
ISSUE:
I run my 2012 macbook air in "clamshell mode", and solely use the 27" display, which works great. Problem, is when the macbook goes to put the display to sleep, or sleep for the laptop, the display starts to go into power save mode, then flips back on... goes back into power save mode, repeats forever. I called HP, and they said the HDMI signal is not being turned off, hence why the screen keeps going ON, then power save, then repeat. If I shutdown the laptop, then the monitor goes off just fine.
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Joe

Hello Joe,
I definitely understand your concern regarding your external display not going to sleep and endlessly looping into power save mode when your MacBook Air is asleep.
I found an article with steps to troubleshoot issues with displays. This article is for internal and external displays, so you can skip any steps referring to the internal display. The following steps specifically stands out to me for the situation you are experiencing:
Reset the system
You can reset the Mac's parameter RAM and SMC.
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Thank you for using Apple Support Communities.
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Hi, I have just bought a 22" Westinghouse monitor connected to the dvi and I have no idea on how to display its native resolution of 1680x1050 I have tried mirroring the two monitors and it will not allow me to view the native resolution on my new monitor.
Any help with this is greatly appreciated. Thank you in advance.
Message was edited by: earnerich

earnerich,
When mirroring, your Macbook Pro will default to the highest resolution of the lowest-resolution display. In this case, your external monitor must be driven at your Macbook Pro's highest resolution; 1440 X 900.
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Scott

10.7.3 external monitor "input not supported"

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