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Discussion Starter · #1 ·
For the last 6 years or so, I have had my Macbook pro (mid 2009) hooked up to an external monitor - on mirror mode. Until a month ago, all has worked well. Last month, when someone dusted my desk, the external monitor stopped working. But with a few wiggles, turn on and off, reboot etc etc - it went back to being AOK.

However, this week, maybe something got moved, it stopped working again. Now, no matter how many times we try to get it to start back up - we have been unsuccessful. In fact, there is nothing showing on the computer that one could construe as an external monitor.

DH seems to think it might be the video card is not working properly. Any thoughts?

Thank you
 

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If nothing is showing up in the Displays section of System Preferences, then I'd triple-check the cable (are you using VGA / HDMI / other?). Check the adapter too. Crud in the ends could be an issue...

You may also find this app useful for managing external monitors:

https://itunes.apple.com/ca/app/display-menu/id549083868?mt=12 (iTunes Store; free basic; paid upgrade $2.79)

Developer's site: Display Menu

Cheers!
 

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Have you confirmed that the monitor itself is OK? Sadly in todays world 6 or 7 years is past the internal self-destruct sequence seemingly built in to some devices.
 

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If you are able, perhaps attempt a connection with one of the other inputs, if available (i.e., if using VGA, try an HDMI connection, vice-versa).

And I forgot to add... when you open the Displays preference pane, hold OPTION and a button "Detect Displays" will appear. Click it to see if it can find the external.
 

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Discussion Starter · #5 ·
We've checked all the settings (thank you for the 'options' reminder), connected, disconnected, checked monitor etc etc and no success as yet. There is no other method of connecting (different input) so will be purchasing a new adapter to check that out ...and will update

Thank you for all your help
 

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Just to reiterate eMacMan's suggestion - have you tried to connect to another monitor with / without your cable and adapter? Just to take that off the table?
 

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Discussion Starter · #7 ·
Yes - we tried another monitor - the computer does the same thing - it is not recognized as a device
 

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What are the cables you are using (VGA, DVI, HDMI)?
A colleague of mine was having a heck of a time getting two monitors up and running, and it turned out to be one of or both of his HDMI cables. There is apparently was an issue with the fact they were both older 1.2 or 1.3 HDMI his Mac didn't like that. Granted he was on a Mini.

BReligion
 

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Discussion Starter · #9 ·
We were using VGA cable

AND - we now have a new cable.......the monitor woks!

Thank you all for your help
 

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I have a brand new VGA cable that does not work with either my old MacPro or the newer MacBookPro. Seems there are style variants of VGA and only one of them connects properly to all Macs.
 
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