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  1. #1
    Bad Wifi reception on MacBook when external monitor is attached

    Member Since
    Aug 26, 2007
    Location
    California
    Posts
    4
    Specs:
    MacBook (white), 2GHz, 2.5GB RAM, 80GB HDD
    Question Bad Wifi reception on MacBook when external monitor is attached
    Hi,

    I recently bought a MacBook (white) and it runs like a charm.
    The Wifi reception is very good when I run my MacBook with the built-in screen (no external monitor).
    However, as soon as I attach my 20" Samsung SyncMaster 203B via the mini DVI connector to my MacBook, the internet connection slows down considerably and it also happens occasionally that it enitrely looses the connection to the router. Unplugging the mini DVI connector immediately allows me to reconnect again. It took me some time to figure out that the external monitor was the cause.

    Has anyone else experienced such a problem or even knows how to solve it?

    Cheers!

  2. #2
    Bad Wifi reception on MacBook when external monitor is attached

    Member Since
    Jan 01, 2007
    Location
    Cow Town, Alberta, Canada
    Posts
    1,988
    Specs:
    PowerBook G4 15 inch 1.5 GHz, iMac
    Are you closing the screen when the external is connected?

  3. #3
    Bad Wifi reception on MacBook when external monitor is attached

    Member Since
    Aug 26, 2007
    Location
    California
    Posts
    4
    Specs:
    MacBook (white), 2GHz, 2.5GB RAM, 80GB HDD
    I use both screens when the external is connected.

  4. #4
    Bad Wifi reception on MacBook when external monitor is attached

    Member Since
    Jan 01, 2007
    Location
    Cow Town, Alberta, Canada
    Posts
    1,988
    Specs:
    PowerBook G4 15 inch 1.5 GHz, iMac
    Oh. Then I can't think of any reason, other than the screen is blocking the antennas...

    Call apple.

  5. #5
    Bad Wifi reception on MacBook when external monitor is attached

    Member Since
    Feb 18, 2008
    Posts
    1
    Same problem with MacBook and external Samsung monitor
    I also have a MacBook that I'm using with and external Samsung LCD monitor. When I have the external monitor plugged in and turned on my MacBook can't connect to the internet via WiFi. When I leave the external monitor plugged in but simply turn off the power my WiFi magically works again! So, what is the deal with the Samsung monitor blocking the WiFi signal when turned on? Has anyone figured out a reason?

  6. #6
    Bad Wifi reception on MacBook when external monitor is attached
    kgeier82's Avatar
    Member Since
    Dec 01, 2006
    Posts
    1,495
    Specs:
    MBP 2.4/2GB/200HD/256 8600gt
    maybe some sort of interference from monitor?

    sounds like it. where is the router in relation to the the laptop and monitor?
    2.4ghz Unibody | Hitachi 320GB 7200 | 256MB 9600gt

  7. #7
    Bad Wifi reception on MacBook when external monitor is attached

    Member Since
    Jun 02, 2008
    Posts
    2
    Same problem
    I have exactly the same problem. I plug my samsung 204B monitor on my MacBook Pro and the Wifi connection stop. It happen only when the setting is 1600x1200. With a low definition the wifi is working.
    Have some information ? where does the problem come ? Samsung or Mac ?
    Thanks for you help.

  8. #8
    Bad Wifi reception on MacBook when external monitor is attached
    JohnTheMacGeek's Avatar
    Member Since
    Feb 05, 2008
    Location
    Alabama
    Posts
    874
    Specs:
    Mid 2009 MacBook Pro  Mid 2007 iMac  4G iPod Touch  iPhone 4S  iPad
    This is really odd. I wonder how these two systems are connected? Have you updated to 10.5.3 yet?

  9. #9
    Bad Wifi reception on MacBook when external monitor is attached
    mrplow's Avatar
    Member Since
    Oct 01, 2007
    Location
    UK
    Posts
    6,759
    Specs:
    27" iMac i7 (2011) 10.10, iPhone6, iPad Air 2, AppleTV2
    Definitely sounds like interference. Worth trying another channel on your router?
    External hard disk acquisition addict - but admitting the problem is the first step to a robust backup

    Please use the reputation system if you think you've been helped - top right of this post

  10. #10
    Bad Wifi reception on MacBook when external monitor is attached

    Member Since
    May 16, 2008
    Posts
    30
    I was thinking the same thing. Try router on another channel. However if any are like like my router, the 108mps is only available on channel 6.

  11. #11
    Bad Wifi reception on MacBook when external monitor is attached

    Member Since
    Jun 02, 2008
    Posts
    2
    problem solve: thanks
    You are right, the problem is comming from interferences.
    I just try with another chanel and it works fine.
    Thanks for your help.
    Regards.

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