Startech.com 1U Rackmount USB KVM Switch SV1631DUSBU User Manual

Content

StarTech.com 1U Rackmount USB KVM Switch SV1631DUSBU Manual

Introduction

The startech.com 1U Rackmount USB KVM Switch SV1631DUSBU is a 16-port keyboard, video, and mouse management device designed to control multiple computers from one shared console. By connecting a single VGA monitor, USB keyboard, and USB mouse to the KVM switch, administrators can access and manage up to 16 USB-enabled computers without dedicating a separate monitor and input set to every system.

Its 1U rackmount design makes the switch suitable for server rooms, equipment racks, test laboratories, control rooms, and technical workstations where space efficiency matters. Front-panel push buttons, keyboard hotkeys, and an on-screen display provide several ways to select connected computers. The OSD also helps identify systems by assigned names, which is useful when many servers have similar hardware or are installed in a dense rack.

The switch supports VGA video with resolutions up to 1920 × 1440 and includes an auto-scan function for sequentially monitoring connected systems. Cascading allows compatible KVM switches to be linked when a larger installation is required. This makes the SV1631DUSBU a practical choice for IT administrators, system builders, data-center technicians, and organizations maintaining legacy VGA equipment.

Use this guide to install the StarTech 16-port USB KVM switch safely, configure computer channels, operate the OSD, and resolve common display, keyboard, mouse, and switching problems.

Specifications of the StarTech SV1631DUSBU 16-Port KVM Switch

Product type: 16-port USB KVM switch with VGA video and on-screen display.
Computer connections: One DE-15 VGA connection per computer port, with USB control through compatible KVM cables.
Console connections: One female DE-15 VGA connector and two USB Type-A female connectors for the monitor, keyboard, and mouse console.
Supported computer interfaces: USB systems; compatible cable configurations may also support legacy PS/2 installations.
Maximum video resolution: 1920 × 1440.
Switching methods: Front-panel push buttons, keyboard hotkeys, and OSD menu controls.
Rack compatibility: 1U rackmount installation using the supplied mounting hardware where applicable.
Expansion: Cascading is supported for larger multi-switch installations.
Maximum cascaded capacity: Up to 136 computers in a supported cascade arrangement.
Status indicators: Individual port power or selection LEDs for connected channels.
Operating temperature: 5°C to 40°C.
Storage temperature: -20°C to 60°C.
Relative humidity: Up to 80%.
Power input: 9–12V DC, with a minimum current requirement that depends on the applicable hardware revision.
Dimensions: Approximately 438 × 180 × 44 mm for the 16-port rackmount chassis.
Weight: Approximately 3.1 kg.

How to Set Up the StarTech.com 1U Rackmount USB KVM Switch SV1631DUSBU

Power down equipment: Shut down all computers, the KVM switch, and the monitor before connecting cables. Confirm that connected equipment is properly grounded.
Install the chassis: Attach the rack ears and secure the unit in a suitable 1U rack position. Leave enough space for ventilation and access to the rear connectors.
Connect the console: Attach the VGA monitor to the console VGA port. Connect the USB keyboard and USB mouse to the two console USB ports.
Connect computers: Use compatible StarTech KVM cables to connect each computer’s VGA output and USB interface to a numbered PC port on the switch. Keep cable routing neat and label both ends.
Apply power: Connect the correct DC adapter, then turn on the KVM switch and monitor. Start the connected computers and allow them to complete their boot sequence.
Select a channel: Use the front-panel buttons, hotkey commands, or OSD menu to choose a computer. Assign clear OSD names such as “Web Server 01” or “Test Workstation.”
Configure scanning: Use the OSD to enable auto-scan and adjust the scan interval if supported by the installed firmware.
For cascading: Connect the appropriate console and computer ports between compatible KVM units, then assign channels carefully to avoid duplicate port names.

Do not force connectors, use an incorrect power adapter, block ventilation openings, or disconnect active cables during a firmware-independent hardware installation.

Troubleshooting the SV1631DUSBU KVM Switch

No video or “No Signal” message

Verify that the monitor is connected to the console VGA port rather than a computer port. Confirm that the selected computer is powered on, the VGA cable is fully seated, and the monitor input is set correctly. Test the computer directly with the same monitor and cable to isolate a source problem. If the computer uses a video adapter, confirm that it supports the selected VGA resolution.

Keyboard or mouse does not respond

Reconnect the USB devices to the console ports and restart the selected computer if USB enumeration failed during startup. Try a basic wired keyboard or mouse without a hub, wireless receiver, or special driver. Confirm that the KVM cable supports USB keyboard and mouse control and that the correct channel is selected.

Hotkeys do not work

Open the OSD with the front-panel control and check the configured hotkey sequence. Avoid pressing hotkeys while a system is processing a command, and test the front-panel channel button to determine whether the issue affects only keyboard control.

Incorrect channel or scan behavior

Review OSD port names, scan settings, and cascade assignments. Remove disconnected computers from the scan list where possible. A channel with no active computer may appear blank during automatic scanning.

Preventive maintenance and support

Use labeled cables, maintain airflow, protect the unit from moisture and static discharge, and avoid exceeding the specified operating environment. For documentation, downloads, and technical assistance, use the StarTech.com Support page. StarTech.com provides lifetime technical support under its support and warranty program; retain the product identification information when requesting help.

Pros and Cons of the StarTech.com 1U Rackmount USB KVM Switch SV1631DUSBU

Advantages

High port density: One 1U chassis provides access to up to 16 computers, saving rack space compared with separate console equipment.
Flexible operation: Front buttons, hotkeys, and OSD controls suit different working environments, from a local rack to a seated administration console.
Useful VGA support: The 1920 × 1440 maximum resolution is suitable for many legacy servers, workstations, diagnostic systems, and industrial computers.
Organized administration: OSD port naming and auto-scan functions make it easier to identify and monitor multiple systems.
Expandable design: Cascading can extend the installation beyond the base 16-port capacity when compatible equipment and careful port planning are used.
Rack-ready construction: The 1U format is well suited to conventional server racks and compact equipment cabinets.

Limitations

VGA-dependent video: The switch is intended for VGA systems and does not provide modern HDMI, DisplayPort, or USB-C video switching.
Local-console operation: It does not replace an IP KVM when administrators need remote browser-based access over a network.
Cable requirements: Compatible KVM cables are needed for each computer, and incorrect cable selection can prevent keyboard or mouse control.
Legacy-focused resolution: Users requiring high-refresh-rate, widescreen, 4K, or multi-monitor output should choose a newer digital KVM platform.

The SV1631DUSBU is best for organizations managing multiple USB and VGA computers from one local rack console. Choose another product category when remote access, digital video, audio switching, USB peripheral sharing, or multi-display support is essential.

PDF

Faqs

How do I set up the startech.com 1U Rackmount USB KVM Switch SV1631DUSBU for the first time?

Install the SV1631DUSBU in a standard 1U rack position or place it securely on a desktop. Connect a VGA monitor and USB keyboard and mouse to the console ports, then connect each computer to a numbered PC port using a compatible StarTech KVM cable. Attach the power adapter, turn on the KVM switch, and start the connected computers. Select a computer with the front-panel buttons, hotkey controls, or the on-screen display.

Why is the monitor showing no video through the startech.com 1U Rackmount USB KVM Switch SV1631DUSBU?

Confirm that the VGA cable is firmly connected to both the console monitor and the selected computer cable. Check that the monitor is switched to the correct VGA input and that the computer is powered on. Select another port, then return to the original port to refresh the connection. If video remains unavailable, test the monitor and VGA cable directly with the computer and verify that the display setting does not exceed the KVM switch’s supported resolution.

Can the startech.com 1U Rackmount USB KVM Switch SV1631DUSBU work without installing drivers?

Yes. The SV1631DUSBU is designed for operating-system-independent KVM control, so dedicated software or drivers are generally unnecessary. The connected computers communicate through the USB keyboard and mouse connections and VGA video link. Basic functions remain available during startup because switching occurs through the hardware, front-panel controls, hotkeys, and OSD. Use compatible USB peripherals and KVM cables, and allow the computer to detect the keyboard and mouse after switching ports.

How do I switch between computers on the startech.com 1U Rackmount USB KVM Switch SV1631DUSBU?

You can change computers using the front-panel selection buttons, keyboard hotkeys, or the on-screen display. The OSD is useful when many systems are connected because it lists ports and allows computers to be identified by assigned names. Select the required port and wait briefly for the keyboard, mouse, and video connection to transfer. Avoid rapidly switching repeatedly, especially while a computer is starting, because some systems need time to recognize the shared USB devices.

How can I use auto-scan on the startech.com 1U Rackmount USB KVM Switch SV1631DUSBU?

Auto-scan sequentially displays connected computers so you can monitor several systems from one console. Open the KVM’s OSD or use the documented keyboard command to start scanning, then choose the available scan interval if the menu provides that option. Leave inactive or disconnected ports out when possible to avoid unnecessary pauses. Stop scanning before using the keyboard or mouse for administration, since input may otherwise be directed to whichever computer is currently selected.

What should I do if the keyboard or mouse stops responding after switching ports on the SV1631DUSBU?

First verify that the USB keyboard and mouse are connected to the console USB ports rather than a computer-side connection. Switch to another port and back, then wait for the operating system to re-detect the shared peripherals. Try a basic wired USB keyboard or mouse if advanced wireless or multifunction devices fail. Also reseat the KVM cable at both ends and confirm that the selected computer is running. If only one port fails, test it with a known-good cable.

Can the startech.com 1U Rackmount USB KVM Switch SV1631DUSBU be expanded for more computers?

The SV1631DUSBU supports cascading, allowing compatible KVM switches to be connected in a hierarchical arrangement for larger installations. Plan the port layout before cabling, label every switch and computer, and keep the console connection on the primary KVM clearly identified. Use compatible KVM models and follow the manual’s cascade procedure so keyboard, mouse, video, and OSD switching remain predictable. Test each branch individually before connecting the complete rack system.

How should I maintain and protect the startech.com 1U Rackmount USB KVM Switch SV1631DUSBU?

Keep the KVM switch in a dry, well-ventilated location within its rated operating environment, and avoid blocking ventilation openings. Periodically inspect VGA, USB, KVM, and power connections for looseness or damage. Remove dust with a soft, dry cloth or low-pressure air; do not spray liquid into the enclosure. Label cables and provide strain relief to prevent connector stress. Before cleaning or moving the unit, shut down connected systems when practical and disconnect power safely.