Question about Zonet KVM3002 2-port KVM Switch

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Black line down right side of the monitor (Acer AL1914)

Whenever I use the Zonet KVM3002 2-port KVM the monitor goes out of adjustment. I can use the monitor menu to make things a little better but there is always a black line down the right hand side.

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  • SongCloud Oct 06, 2008

    I have the same issue with an IOGear 8 Port KVM. My Acer AL1914 goes out of adjustment to the right side and I have a Black line down the left side of the monitor. I cannot user the monitor controls to get it back, as it will not adjust it enough for the picture to completely center on the screen.

    The weird part is that it displays properly in the few seconds before it auto-adjusts itself after changing KVM selections. If I could turn off the damn auto-adjust, I might be able to get it to work properly.

  • sudezeeuw Jan 04, 2009

    I have a black margin/line one inch thick down the right side of my screen it seems as if everthing has shifted left any ideas how i can adjust this please????


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I have a toshiba laptop and my two year old son has just pressed all the buttons when i was out the room and i now have one inch black margins on either side of my screen that i just cannot get rid of......any ideas would be much appreciated!!!!!!

Posted on Jul 03, 2009

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Just a solution that might clear this up for some. I have an IOGEAR GCS1204 and encountered the offset screen issue when switching and found that setting each system to a different refresh rate fixed this.

Posted on Feb 05, 2009

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In order to fully answer your question, a number of needful things must be inspected, reinstalled, confirmed, & tested:
  1. Reset. Try the reset button. You could use a paper clip to reach the reset button through the pin hole in the lower front left of the Zonet KVM unit.
  2. Inspect connectors. Each data/input/power connector/port requires all of its pins to be present & straight for full functionality.
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    2. Seat each connector in the appropriate port of a computer that will be accessed via the KVM unit.
  3. Electricity. Inspect all affected devices & confirm that each has sufficient, uninterrupted electricity.
    1. It is possible for a Zonet KVM unit to display channel lights without direct power to the unit, but you should confirm that the unit is getting sufficient, uninterrupted electricity-directly through its own power cord. Unplug the KVM power cord & every connector & reseat each one (this performs a power reset on the KVM unit)-making sure that each connector is in the correct location (not just where it originally was). Thus, make sure that the keyboard, video display (monitor), & mouse are on the output side.
    2. Press the power button on your monitor. If it does not turn off the monitor's power status light (Off/On/Standby), then remove the power cord from the monitor & reseat it-to reset the monitor's hardware. If it does not turn on the monitor's power status light, then the monitor is either not getting enough electricity or it has a malfunction which requires troubleshooting & fixing (possibly through a thread for that monitor model).
    3. Unlike USB devices, PS/2 devices usually require device connection prior to turning on that device. With that said, connect the keyboard & mouse KVM channel cable connectors to the computers & then turn on those computers that you intend to display through the KVM-connected monitor & then turn on these computers.
    4. Any computer that does not turn on has an issue that requires resolving (just like a monitor that would not turn on).
    5. Sometimes a keyboard/mouse interface issue can be resolved by replacing that interface device.
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