Windows 10: can't get y splitter to work on 2 monitors

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  1. Posts : 14
    Windows 10 64 bit
       09 Aug 2017 #1

    can't get y splitter to work on 2 monitors


    I bought a new Dell Inspiron. I already had 2 pretty old Dell monitors, but they work fine. With my old Dell, I had a y splitter that ran out of the back of the VGA port and split and then each monitor was plugged in to the y splitter. This worked great. I had 2 monitors where the screen worked independently of each other.

    For the new Dell, I had to buy a new y splitter. I hook it up to the VGA port and plug each monitor into the y split, like before. Each monitor does get a signal but it shows the same thing on each monitor. It doesn't allow me to select Monitor 1 and Monitor 2. The auto detect doesn't seem to work. Any ideas on how I can get each monitor to work independently of the other?

    Thank you
      My ComputerSystem Spec

  2. Posts : 5,152
    Win10 Home and Pro, Win10 Insider Preview, WinXP Home Premium, Linux Mint
       09 Aug 2017 #2

    I'm replying so as to kick in the Subscribe and follow it.

    The use of a Y-splitter process is quite fine at places like reception desks where the user and client can see exactly the same things.

    I have a client with the same problem of wanting different views, so far I've come to the conclusion that a video card with separate output sockets is needed and the Y-splitter is only feeding the same signals to the 2 monitors.
      My ComputerSystem Spec

  3. Posts : 14
    Windows 10 64 bit
    Thread Starter
       09 Aug 2017 #3

    Except that the one I had before had just one vga output going into a y splitter that went to 2 monitors, and each showed independent screens. I'm wondering if the older hardware or newer OS has something to do with it not working anymore.
      My ComputerSystem Spec

  4.    09 Aug 2017 #4

    What you likely have is one of these,

    DMS-59 - Wikipedia

    Which if that is the case it won't work as the port needs to be the same.
      My ComputerSystem Spec

  5. Posts : 14
    Windows 10 64 bit
    Thread Starter
       09 Aug 2017 #5

    Ah. In the pic below you can see the OLD y splitter that worked. When I got the new pc it had a different port in the back so I could use the old y splitter. I had to get the NEW splitter in the pic. Does this confirm your assumption?

    If this is true that I can't split this way, how can I set up the two monitors for separate viewing? Is that still possible?

    -Thanks so much for your help!

    Click image for larger version. 

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      My ComputerSystem Spec

  6. Posts : 5,152
    Win10 Home and Pro, Win10 Insider Preview, WinXP Home Premium, Linux Mint
       09 Aug 2017 #6

    The 'new' is the VGA type splitter I had to deal with, haven't seen the 'old' type yet, especially not on Notebooks. Even newer/thinner Notebooks don't have the VGA port for external monitors or projectors, have opted for an HDMI port.
      My ComputerSystem Spec

  7. Posts : 2,073
    Windows 7 Pro x64 Windows 10 Pro x64
       09 Aug 2017 #7

    As you can clearly see, the pinout on the old adaptor is totally different then the new, and the socket of course is totally different too, your new PC would have to have a video card with that socket for it to work.

    Otherwise it`s just a duplicate screen, like you have now.
      My ComputersSystem Spec

  8.    09 Aug 2017 #8

    The VGA out only has 1 signal and can only ever supply the 1 source signal. It doesn't have two independents signals to drive two monitors. The VGA splitter just sends that same one signal to both monitors. The other splitter is a custom connector that had access to more than one video signal, more than one source, and thus could drive two monitors independently.
      My ComputerSystem Spec

  9. Posts : 14
    Windows 10 64 bit
    Thread Starter
       09 Aug 2017 #9

    Thanks all. So how do I get the two independent monitors with my current pc? I bought the pc for my wife and she's fussing that she doesn't have her expanded desktop. :)

      My ComputerSystem Spec

  10. Posts : 2,073
    Windows 7 Pro x64 Windows 10 Pro x64
       09 Aug 2017 #10

    You`d have to plug each monitor into a separate video output on the PC.

    If you don`t have more then 1, I guess you can`t.

    How many different video outputs does this (Laptop ?) (desktop ?) have ?

    If it has a VGA output and a HDMI output, then you`d have to get a monitor with a HDMI input.

    But why can`t you just use the (laptop?) screen and 1 other monitor ?

    What exact model do you have ?

    If it`s a desktop, then you just need a video card with at least 2 outputs, most cards today come with 4.

    Or just use the video card from your old PC, that is if the new Dell is a desktop.

    Even the motherboard should have at least 2 video outputs.

    I`ve done many a job where we installed all new equipment and all we had to do was add the old video card to the new pc.
    Last edited by AddRAM; 10 Aug 2017 at 00:25.
      My ComputersSystem Spec

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