4 Port DVI VGA Dual Monitor KVM Switch USB with Audio & USB 2.0 Hub - TAA

Questions & Answers

How do I set up my KVM switch?
Turn off all of the computers and monitors that will be connected to the KVM switch. Connect the power adapter to the KVM switch. Connect the video cables from your monitors to the console video port on the KVM switch. Turn on the monitors. Connect your keyboard and mouse to the console PS/2 or USB ports on the KVM switch. If you have not done so already, change the KVM switch to focus on port 1. Connect the video cables from PC1 to the KVM switch. Connect the PS/2 or USB cables from PC1 to the PC1 PS/2 or USB ports on the KVM switch. Turn on PC1. You should see the computer load the operating system that you are using on PC1. Make sure that the mouse and keyboard can control PC1. Repeat steps 4 to 8 for each additional computer that you want to connect to the KVM switch. Leave the computer in focus until you make sure that the mouse and keyboard can control the computer in step 8.

My Monitors are flickering when connected through the KVM Switch. What do I do?
Monitors may begin flickering when they receive a signal of insufficient quality. There are a few potential fixes available that will help to improve the signal quality in order to eliminate flickering: Replace Video Cables with high-quality Video Cables (e.g. upgrade DisplayPort 1.2 Cables to DisplayPort 1.4 Cables ). Use shorter Video Cables to reduce signal attenuation. When possible, remove Video Adapters to use native Video Connection Types (e.g. go from VGA to VGA , or DisplayPort to DisplayPort ) For DisplayPort Monitors , try changing the DisplayPort Version on the Monitor . For information on how to change your Monitor Settings refer to the Manual from the Monitor Manufacturer . Update the Drivers for the Computer’s GPU to the latest available from the Monitor Manufacturer .

Video and/or USB control works on one connected PC but not another. What do I do?
Ensure the video & USB cables are connected between each computer and the KVM switch Safely power off all computers. Unplug everything from the KVM switch and connect one computer at a time, swapping the inputs previously used (e.g., the computer connected to PC2 now connects to PC1). Power on each computer and confirm functionality before connecting the next one to the KVM switch. If using a KVM switch that supports multiple displays, ensure all video connections from the computer are from either the video card or motherboard, both cannot be used simultaneously on most systems.

Everything is hooked up but nothing is working. What should I do?
There are some quick tests that you can perform to rule out potential issues. Start by turning off all of the connected computers and peripherals, unplugging everything from the KVM, including power, and leaving it for 10 seconds. Then connect everything to the KVM following the procedure in the following FAQ: https://www.startech.com/faq/kvm-switches-setup . You can test to make sure that the following components are working correctly and are not the source of the issue: Video cables KVM switch Video source (such as a DVR or computer) Video destination (such as a monitor or projector) Note: When you are testing your setup components, it is recommended that you avoid using any video adapters. For example, if you are converting a VGA source to HDMI to be used with an HDMI extender, you should test with an HDMI source. To test your setup components, try the following: Use the video cable, KVM switch, video source, and video destination in another setup to see if the problem is with the components or the setup. Use a different video cable, KVM switch, video source, and video destination in your setup to see if the problem persists. Ideally, you should test a component that you know works in another setup. When you test your cables, it is recommended that you do the following: Test each cable individually. Use short cables when you are testing. When you test the video source and video destination, it is recommended that you do the following: Remove the KVM switch from your setup and test to make sure that the video source and video destination work together without the KVM switch. Test to make sure that the video source and video destination work together at the resolution that you want to use. Note: In order for your setup to work properly, the video source, KVM switch, and video destination all need to support the resolution that you are using.

Certain KVM ports or computers are working but not all of them. What do I do?
There are four troubleshooting actions that you can try if some but not all of the ports and your computer are working with the KVM switch. To determine if a specific cable is the source of the problem, switch the cables that connect the KVM switch to the computers to one working port and computer, and one port and computer that is not working. Keep the computer plugged into the same ports and only switch the cables. If the issue persists when you switch cables, the issue may be with the cable itself. To determine if the problem is between the computer and the KVM switch, using the same cables, connect the KVM switch to one computer that is working and one computer that is not working. If the issue persists when you switch computers, follows the issue may be with the computer and the KVM switch. Try reinitializing the KVM. This is done by following the setup instructions on the website. To determine if the KVM switch is the source of the problem, if you have another KVM switch, disconnect the current KVM switch and connect the second KVM switch.

Only the monitors hooked up through VGA or hooked up through DVI are working. What do I do?
This KVM switch is meant to be used with two monitors, with up to two or four computers, each with an available VGA and DVI port. The VGA ports on the KVM switch only talk to each other, and the DVI ports work in the same way. Therefore, if you plug a VGA monitor into the KVM switch and only plug a DVI cable into your computer, your monitor will not work.

My keyboard keeps repeating keys when it is plugged into the KVM. What do I do?
If the keys on your keyboard are repeating, complete the following: If the KVM you are using has USB ports, you can move your keyboard to the USB hub port on the back of the KVM (the USB hubs are marked). Note: When you move the keyboard out of the keyboard port, you will not be able to access the hotkeys. You can adjust the typematic rate in your operating system’s settings. Depending on the version of Windows you are running, you can adjust the typematic rate by doing one of the following: Click Control Panel > Keyboard > Speed . Adjust the repeat delay and repeat rate until the keys no longer repeat. Click Control Panel > Hardware and Sound > Devices and Printers . Right-click Keyboard Settings . Adjust the repeat delay and repeat rate until the keys no longer repeat.

How to Arrange Windows Monitors to Fix Mouse Issues
In order for your mouse to move properly between your monitors you must rearrange your monitors in Windows to match the physical location of your monitors on your desk. To do so, complete the following based on your operating system: Windows 11 Click on the Windows Icon in the Taskbar (or the Windows key on the keyboard) and search for Display Settings . Click on Multiple Displays. Click Identify to display the numbers on each connected monitor, showing how the operating system has assigned their positions. Click and drag the monitor icons to best match your physical setup. Click Apply to confirm the changes and close the window. Windows 10 and Windows 8 On your keyboard, press the Windows key + X and select Control Panel . Click Appearance and Personalization , then click Display . Click the Resolution or Adjust Resolution option from the left column, which will display your monitors as numbered icons. Click Identify to display the numbers on each connected monitor, showing how the operating system has assigned their positions. Click and drag the monitor icons to best match your physical setup. Click OK to apply the changes and close the window. Windows 7 and Windows Vista Click the Start button and select Control Panel . Click Appearance and Personalization, then click Display . Click the Resolution or Adjust Resolution option from the left column, which will display your monitors as numbered icons. Click Identify to display the numbers on each connected monitor, showing how the operating system has assigned their positions. Click and drag the monitor icons to best match your physical setup. Click OK to apply the changes and close the window. Windows XP Click the Start button and select Control Panel . Double-click Display . Click the Settings tab, which will display your monitors as numbered icons. Click Identify to display the numbers on each connected monitor, showing how the operating system has assigned their positions. Click and drag the monitor icons to best match your physical setup. Click OK to apply the changes and close the window. To mirror the image from your primary monitor instead of extending your desktop, refer to the following FAQ: http://www.startech.com/faq/Windows_Mirroring_Monitors

How can I identify which DVI connector type I have or need?
You can identify the DVI connector type by the pin configuration and determine compatibility based on whether the connection supports analog, digital, or both signal types. Explanation: DVI (Digital Visual Interface) connectors are defined by their pin layout and supported signal type. The main DVI connector types are: DVI-A (17 pin) . Analog signal only DVI-D Single Link (19 pin) . Digital signal only DVI-D Dual Link (25 pin) . Digital signal only, higher bandwidth DVI-I Single Link (23 pin) . Supports both analog and digital signals DVI-I Dual Link (29 pin) . Supports both analog and digital signals, higher bandwidth DVI-A is used for analog signals (similar to VGA), while DVI-D is used for digital signals (similar to HDMI). DVI-I connectors can carry both analog and digital signals, but actual support depends on the device’s specifications. Single Link and Dual Link indicate bandwidth capacity, which affects maximum supported resolution. Typical limits are up to 1920 × 1080 @ 60 Hz for Single Link and up to 2560 × 1600 @ 60 Hz for Dual Link. However, actual resolution support depends on the capabilities of the connected devices, not just the connector type. To ensure compatibility, verify both the connector type and the signal support in the specifications of the source and display devices.

What is a KVM switch, and how do I determine if it is compatible with my setup?
A KVM switch allows you to control multiple computers with one keyboard, monitor, and mouse, and compatibility depends on matching the number of systems, connection types, and feature requirements. Explanation: A KVM (Keyboard, Video, Mouse) switch enables a single set of peripherals to control multiple computers. Many KVM switches also support additional devices such as USB peripherals and audio. There are several types of KVM switches designed for different use cases: Standard KVM switches : Connect multiple computers using a central unit. Cable KVM switches : Integrate cables into the design for simpler setups. Multi-monitor KVM switches : Support switching between multiple displays per computer. Secure KVM switches : NIAP-certified for secure environments. To ensure compatibility, verify the following: Number of computers : The KVM switch must support the total number of connected systems. Video interfaces : Match the video input/output types (such as HDMI, DisplayPort, or DVI) across all devices. Peripheral connections : Confirm support for USB or PS/2 keyboards and mice. Display requirements : Ensure the KVM switch supports the required resolution and number of monitors. Additional features : Check for audio support or hotkey switching if needed. Some KVM switches require specific or proprietary cables, which are included or listed as accessories for the product. Basic wired keyboards and mice are recommended, as wireless, gaming, or combined receiver devices may not function reliably with KVM switches.

What should I consider when choosing cables for a KVM switch?
KVM cable requirements depend on the specific KVM switch; some use standard cables, while others require proprietary cables designed for that model. Explanation: KVM switches connect multiple computers to a single set of peripherals, and each connected computer typically requires one set of cables. Cable requirements vary by KVM switch design: Standard KVM switches : Use standard video (such as HDMI, DisplayPort, or DVI) and USB or PS/2 cables. These cables can be purchased individually or as bundled kits for convenience. Opposite gender connections : Some KVM switches use different connector genders for computer and console ports to prevent incorrect connections. These setups may require extension cables or specific cable kits. Proprietary cable KVM switches : Some models, especially those designed for server environments, require proprietary cables. These cables combine video and USB or PS/2 signals into a single connector and cannot be replaced with standard cables. To determine the correct cables: Check the product’s Technical Specifications and “What’s in the Box” to see if cables are included. Review the Accessories section for compatible cable options. Inspect the port layout; if there are no standard USB or PS/2 ports for computers, proprietary cables are required. Using the correct cable type is essential to ensure proper functionality and compatibility with the KVM switch. If at this point you require further assistance in deciding which cables to purchase with your StarTech.com KVM switch, contact our technical support team.

Are all mice and keyboards compatible with this StarTech.com KVM switch?
No, not all mice and keyboards are compatible; standard HID-compliant wired devices are recommended, while advanced or high-power devices may not function correctly. Explanation: StarTech.com KVM switches are designed to support standard HID (Human Interface Device) keyboards and mice, including common wired and wireless models from major brands. However, compatibility depends on the device’s features and power requirements. Keyboards and mice with programmable keys, built-in USB or audio pass-through ports, or high power consumption (such as RGB lighting) may not work reliably through the dedicated HID ports. For consistent performance, use a basic wired keyboard and mouse. If a device does not function through the HID ports, it can be connected to the KVM switch’s USB hub ports, if available, which provide broader compatibility. However, when a keyboard is connected through the USB hub ports instead of the HID port, KVM-specific functions such as hotkey switching may not be supported.

How can I convert the VGA output on this device to DVI, HDMI, or DisplayPort?
This device outputs an analog VGA signal. To connect it to a display that uses DVI, HDMI, or DisplayPort, an active video converter is typically required. The exact conversion method depends on the input type supported by the destination display. Explanation: VGA is an analog video standard. Most modern display interfaces, including HDMI, DisplayPort, and DVI-D, use digital video signaling. As a result, signal conversion is often required when connecting a VGA source to a non-VGA display. The following table outlines example adapters for common conversion paths: Target connection First conversion Second conversion (if required) DVI-D VGA to HDMI: https://www.startech.com/VGA2HDU HDMI to DVI-D: https://www.startech.com/HDDVIMF8IN DVI-I VGA to DVI-I: https://www.startech.com/dvivgafm N/A HDMI VGA to HDMI: https://www.startech.com/VGA2HDU N/A DisplayPort VGA to HDMI: https://www.startech.com/VGA2HDU HDMI to DisplayPort: https://www.startech.com/128-hdmi-displayport When selecting a conversion solution, use the fewest possible adapters and converters. Fewer conversion stages typically improve reliability and simplify installation. Understanding DVI-I and DVI-D When converting a VGA signal to DVI, it is important to identify the type of DVI connection used by the destination device. DVI-I supports both Analog and digital signals, whereas DVI-D supports digital signals only. Because VGA is an analog signal: VGA can be adapted directly to DVI-I when the destination device supports analog DVI-I signaling. VGA cannot be adapted directly to DVI-D without an active signal converter because DVI-D supports digital video only. Some devices include a DVI-I connector but support only DVI-D signaling internally. In these cases, a passive VGA-to-DVI-I adapter will not work. Before selecting a conversion solution, verify: The video output type of the source device (VGA) The video input type of the display (HDMI, DisplayPort, DVI-I, or DVI-D) Whether the destination device supports analog or digital signaling Any resolution or refresh rate requirements for the installation Choosing the correct converter ensures compatibility and helps maintain the best possible video quality for the connected display.

How can I connect this DVI-I output to a VGA, HDMI, or DisplayPort display?
A DVI-I output can be connected to VGA, HDMI, or DisplayPort displays using the appropriate adapter or video converter. The required solution depends on the input type of the display and whether analog or digital video signaling is needed. Explanation: This device features a DVI-I output, which supports both analog and digital video signals. Because DVI-I supports both signaling types, it can be adapted to several common display interfaces. VGA: A DVI-I to VGA adapter or cable can be used because both interfaces support analog video. HDMI: A DVI to HDMI adapter or cable can be used to connect to an HDMI display using the digital video portion of the DVI-I signal. DisplayPort: An active DVI to DisplayPort converter is typically required because DVI and DisplayPort use different signaling technologies. When selecting a conversion solution, use the fewest possible adapters and converters to reduce complexity and improve compatibility. Before purchasing an adapter or converter, verify: The video input type on the display The required resolution and refresh rate Whether the destination device supports analog or digital video input Although DVI-I supports both analog and digital signaling, some devices with DVI-I connectors may support only digital DVI-D signaling internally. Refer to the device specifications to confirm supported signal types.

How can I connect a DVI, HDMI, or DisplayPort video source to this device's VGA input?
This device features a VGA input. If your video source uses DVI, HDMI, or DisplayPort, you must use the appropriate adapter or video converter to convert the source signal to VGA. Explanation: VGA is an analog video standard. Most modern video interfaces, including HDMI, DisplayPort, and DVI-D, use digital video signaling and require signal conversion before they can connect to a VGA input. Common conversion options include: DVI-I source: A passive DVI-I to VGA adapter or cable can be used if the DVI-I output supports analog video signaling. DVI-D source: An active DVI-D to VGA converter is required because DVI-D supports digital video only. HDMI source: An active HDMI to VGA converter is required because HDMI uses digital video signaling. DisplayPort source: An active DisplayPort to VGA converter is required because DisplayPort uses digital video signaling. DVI-I vs. DVI-D Before selecting a DVI conversion solution, determine whether the source device uses DVI-I or DVI-D. DVI-I can support both analog and digital video signals. DVI-D supports digital video signals only. Some devices use a DVI-I connector but support only digital DVI-D signaling internally. In these cases, a passive DVI-I to VGA adapter will not work, and an active DVI-D to VGA converter is required. Before purchasing a converter, verify: The video output type of the source device The required resolution and refresh rate Whether the source supports analog or digital signaling Choosing the correct converter ensures compatibility and reliable video output to the VGA input.

What DVI cable connector size is compatible with this KVM switch?
This KVM switch supports DVI cables and adapters with connector widths of 39.5 mm or less; larger connectors are not supported. Explanation: The DVI ports on this KVM switch are tightly spaced, which creates strict physical clearance requirements for adjacent connectors. DVI cable or adapter housings wider than 39.5 mm may block neighboring ports or prevent proper insertion, resulting in connection issues. To ensure full port usability and reliable connectivity, use only DVI cables that meet the 39.5 mm maximum connector width. The DVI cables listed in the product’s Accessories tab have been validated for fit and compatibility with this KVM switch.

What DC barrel connector power plug types do StarTech.com products use, and what are their dimensions?
StarTech.com DC barrel connector plug types are defined in the “Plug Type” field of the technical specifications, using a letter code that specifies the connector’s outer diameter (OD) and inner diameter (ID) in millimeters for power adapter compatibility. Explanation: In StarTech.com technical specifications, the “Plug Type” field is a standardized identifier for the exact DC barrel connector size required to power a product. Each plug type is assigned a letter code that corresponds to a specific combination of outer diameter (OD) and inner diameter (ID), measured in millimeters. Common DC barrel plug type dimensions Plug Type OD ID A 2.35 mm 0.7 mm B 4.0 mm 1.7 mm C 4.75 mm 1.7 mm H 3.4 mm 1.3 mm L 5.0 mm 2.5 mm M 5.5 mm 2.1 mm N 5.5 mm 2.5 mm The DC barrel connector plug type must match both the outer diameter and inner diameter exactly. A mismatch between the StarTech.com product requirement and the power adapter connector can prevent proper fit or stable power delivery, which may result in device startup failure or intermittent operation. The plug type defines only the physical connector size. The plug type does not define electrical power requirements such as voltage, current, or polarity. The power adapter used with a StarTech.com product must match the product’s specified electrical requirements. Using an incompatible power adapter can cause device malfunction or permanent damage. This standardized DC barrel connector plug type system enables IT professionals and procurement teams to verify connector dimensions, ensure power adapter compatibility, standardize hardware deployments, and identify the correct replacement power supply for StarTech.com products.

Can I disable the beep the KVM switch makes when entering hotkey commands?
The beeping sounds cannot be disabled. They help confirm that a successful or unsuccessful hotkey command has been entered. Many people position their KVM switch out of sight. As a result, this feature saves time by not having to check the LEDs or press the physical buttons on the KVM switch.