External display UNITED LED22W11 not detected

I'm having problems trying to connect my external monitor UNITED LED22W11 to my MacBook Pro with OS X 10.9.
Unfortunately I can't give you any other informations since when I plug it in through my Belkin mini displayport to HDMI adapter nothing happens (and it's not detected even if I select "Detect displays" in System Preferences).
I've already tried to connect my MacBook Pro with the same cable to another external monitor and it works (same thing if I connect the UNITED monitor to a pc).
Hope someone could help.
Sirion

Hi, koles
Thank you for the information. In the past, updating BIOS was something that was rarely done, as it could lock up and not work, which would render the computer useless if it failed. Today, however, it is not like it once was. As with updates, there is still some risk involved, but there is now a utility that will update the BIOS for you. If you'd like, you can update all the other drivers first and then do the BIOS as a last resort if you would rather not try it unless you need to.
Hope it helps. Keep me posted!
Best,
Adam
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Hi, koles
Thank you for the information. In the past, updating BIOS was something that was rarely done, as it could lock up and not work, which would render the computer useless if it failed. Today, however, it is not like it once was. As with updates, there is still some risk involved, but there is now a utility that will update the BIOS for you. If you'd like, you can update all the other drivers first and then do the BIOS as a last resort if you would rather not try it unless you need to.
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Did someone help you today? Press the star on the left to thank them with a Kudo!
If you find a post helpful and it answers your question, please mark it as an "Accepted Solution!" This will help the rest of the community with similar issues identify the verified solution and benefit from it.

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Here are some of the options I've read about on here that may or may not work:
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Hi marconi de baloni,
Thanks for the question. Based on what you stated, it seems like the computer is not recognizing a second display. I would recommend that you read this article, it may be able to help you resolve or isolate the issue.
OS X Yosemite: Connect multiple displays to your Mac
If a display is not recognized, choose Apple menu > System Preferences on the primary Mac, click Displays, then click Display.
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You can also try putting your Mac to sleep and then waking it.
Thanks for using Apple Support Communities.
Cheers,
Mario

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If you find a post helpful and it answers your question, please mark it as an "Accepted Solution"! This will help the rest of the Community with similar issues identify the verified solution and benefit from it.
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External display UNITED LED22W11 not detected

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