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4-Port Dual HDMI KVM
Switch|4K 30Hz
User Manual
SKU#: SV431DHD4KU
Actual product may vary from photos
For the latest information and specications visit
www.startech.com/SV431DHD4KU
Manual Revision: 03/29/2019
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Compliance Statements
FCC Compliance Statement
This equipment has been tested and found to comply with the limits for a
Class A digital device, pursuant to Part 15 of the FCC rules. These limits are
designed to provide reasonable protection against harmful interference when
the equipment is operated in a commercial environment. This equipment
generates, uses and can radiate radio frequency energy and, if not installed and
used in accordance with the instruction manual, may cause harmful interference
to radio communications. Operation of this equipment in a residential area is
likely to cause harmful interference in which case the user will be required to
correct the interference at his own expense.
This device complies with part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) This device may not cause harmful interference,
and (2) this device must accept any interference received, including interference
that may cause undesired operation.
Changes or modications not expressly approved by StarTech.com could void
the user’s authority to operate the equipment.
Industry Canada Statement
This Class A digital apparatus complies with Canadian ICES-003.
CAN ICES-3 (A)/NMB-3(A)
Use of Trademarks, Registered Trademarks, and other
Protected Names and Symbols
This manual may make reference to trademarks, registered trademarks, and
other protected names and/or symbols of third-party companies not related in
any way to StarTech.com. Where they occur these references are for illustrative
purposes only and do not represent an endorsement of a product or service
by StarTech.com, or an endorsement of the product(s) to which this manual
applies by the third-party company in question. Regardless of any direct
acknowledgement elsewhere in the body of this document, StarTech.com
hereby acknowledges that all trademarks, registered trademarks, service marks,
and other protected names and/or symbols contained in this manual and
related documents are the property of their respective holders.
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Safety Statements
Safety Measures
• Wiring terminations should not be made with the product and/or electric
lines under power.
• Product installation and/or mounting should be completed by a certied
professional as per the local safety and building code guidelines.
• Cables (including power and charging cables) should be placed and routed
to avoid creating electric, tripping or safety hazards.
Mesures de sécurité
• Les terminaisons de câblâge ne doivent pas être eectuées lorsque le produit
et/ou les câbles électriques sont sous tension.
• L’installation et/ou le montage du produit doit être réalisé par un
professionnel certié et dans le respect des normes locales et du code de
construction local.
• Les câbles (y compris les câbles d’alimentation et de chargement) doivent
être placés et acheminés de façon à éviter tout risque électrique, de chute ou
de sécurité
安全対策
• 電源が入っている状態の製品または電線の終端処理を行わないでくださ
い。
• 製品の設置やマウントは、使用地域の安全ガイドラインおよび建築基準に
従い、有資格の専門業者が行うようにしてください。
• ケーブル（電源ケーブルと充電ケーブルを含む）は、適切な配置と引き回し
を行い、電気障害やつまづきの危険性など、安全上のリスクを回避するよう
にしてください 。
Misure di sicurezza
• I terminiali dei li elettrici non devono essere realizzate con il prodotto e/o le
linee elettriche sotto tensione.
• L’installazione e/o il montaggio dei prodotti devono essere eseguiti da un
tecnico professionale certicato che conosca le linee guida locali sulle norme
edilizie e sulla sicurezza.
• I cavi (inclusi i cavi di alimentazione e di ricarica) devono essere posizionati
e stesi in modo da evitare pericoli di inciampo, rischi di scosse elettriche o
pericoli per la sicurezza.
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Säkerhetsåtgärder
• Montering av kabelavslutningar får inte göras när produkten och/eller
elledningarna är strömförda.
• Installation och/eller montering får endast göras av behöriga yrkespersoner
och enligt gällande lokala förordningar för säkerhet och byggnormer.
• Kablar (inklusive elkablar och laddningskablar) ska dras och placeras på så
sätt att risk för snubblingsolyckor och andra olyckor kan undvikas.
Warning Statements
• Make sure to assemble this product according to the instructions. Failure to
do so might result in personal injury or property damage.
• Never use this product if parts are missing or damaged.
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Table of Contents
Compliance Statements ........................................................................1
Safety Statements ..................................................................................2
Warning Statements ..............................................................................3
Product Diagram ....................................................................................6
Front View ....................................................................................................................................................6
Rear View ...................................................................................................................................................... 7
Product Information ..............................................................................8
Package Contents ..................................................................................................................................... 8
Requirements ............................................................................................................................................. 8
Installation ..............................................................................................9
Connect the Console to the KVM Switch .......................................................................................... 9
Connect a Computer to the KVM Switch .......................................................................................... 10
Installing the Feet ..................................................................................................................................... 11
Operation ................................................................................................11
Hotkey Commands ................................................................................................................................... 11
Push Button Control .................................................................................................................................13
EDID Copy ................................................................................................14
Copying EDID Settings ............................................................................................................................ 14
Auto Learning EDID Settings ................................................................................................................ 14
Resetting EDID Settings .......................................................................................................................... 15
About the LED indicators ......................................................................16
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Troubleshooting .....................................................................................17
PC BIOS Change ......................................................................................................................................... 17
EDID ............................................................................................................................................................... 18
Keyboard and Mouse ............................................................................................................................... 19
Connected USB Device ........................................................................................................................... 19
Functionality ............................................................................................................................................... 20
Display Device ............................................................................................................................................ 21
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Product Diagram
Actual product may vary from photos.
Front View
2
1
3
1
2
3
4
5
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USB HID Port
Port LEDs
USB 3.0 Hub Port
Port Selection Buttons
Power LED
6
5
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Rear View
2 3
4
1
5
1
2
3
4
5
6
7
8
9
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Power Adapter Port
Console HDMI Ports (2)
EDID Copy Buttons (2)
PC HDMI Ports (8)
USB HID Ports (3)
Console Audio Port
PC USB Ports (4)
PC Audio Port (4)
USB 3.0 Hub Port
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Product Information
Package Contents
• KVM Switch x 1
• Universal Power Adapter (NA/JP, EU, UK, ANZ) x 1
• Rubber Feet x 4
• Quick-Start Guide x 1
Requirements
Requirements are subject to change. For the latest
requirements, please visit www.StarTech.com/SV431DHD4KU.
• HDMI cables
• USB-A to USB-B or USB-C to USB-B cables
• 3.5 mm audio cables
• Computer system or video card enabled with HDMI
• Computer system enabled with USB
• Display device (e.g. monitor, projector, TV, and so on) enabled
with HDMI
• Standard USB keyboard and mouse (wired or wireless)
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Installation
Connect the Console to the KVM Switch
1. Turn o your Computer and any connected devices or
peripherals (e.g. printers, external hard drives, etc.).
2. Connect an HDMI Cable to the Console HDMI Port on the
KVM Switch and to a Display Device.
Note: Repeat step 2 to connect additional Display Devices.
3. Connect a Keyboard’s USB Connector to a USB HID Port
on the KVM Switch.
4. Connect a Mouse’s USB Connector to a USB HID Port on
the KVM Switch.
5. The following are optional connections:
• Connect a Speaker’s 3.5 mm Connector to the Console
Audio Port on the KVM Switch.
• Connect a USB peripheral’s Connector to the USB Hub
Port on the KVM Switch.
• Connect additional HID Devices (touch pads,
touchscreens, number pads, etc.) to an available HID Port
on the KVM Switch.
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Connect a Computer to the KVM Switch
Notes: No software or driver installation is required when
connecting a Computer to the KVM Switch.
The cables for each individual Computer must be connected
to the same port set on the KVM Switch.
1. Turn o the Computers that you want to connect to the
KVM Switch and any connected devices or peripherals (e.g.
printers, external hard drives, etc.).
2. Connect an HDMI Cable to the PC HDMI Port on the KVM
Switch and to an HDMI port on a Computer.
3. Connect a USB Cable to the PC USB Port on the KVM
Switch and to a USB port on the Computer.
4. (Optional): Connect an 3.5 mm Audio Cable to the PC
Audio Port on the KVM Switch and to an Audio Output
Port on the Computer.
Note: Repeat step 1 - 4, to connect additional Computers.
5. Connect the Universal Power Adapter to the Power
Adapter Port on the KVM Switch and to an AC Electrical
Outlet. The Power LED will illuminate indicating that the
KVM Switch is receiving power.
6. Turn on any devices or peripherals that are connected to the
KVM Switch.
7. Turn on the connected Computer(s) and wait for the
Computer(s) to nish loading. Test the functionality of the
Keyboard and Mouse connected to the Computer.
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8. If additional Computers are connected to the KVM Switch,
select a dierent port and repeat step 7 until you have tested
the functionality of all of the connected Computers.
Installing the Feet
1. Remove the Adhesive Backing from the Foot Pads.
2. Align each of the Foot Pads with the four impressions on the
bottom of the KVM Switch.
3. While applying pressure, ax the Feet to the bottom of the
KVM Switch.
Operation
Hotkey Commands
You can use keyboard key combinations, called hotkeys, to
operate the KVM Switch.
Notes: Your Keyboard must be connected to one of the HID
Ports on the KVM Switch to use hotkey commands.
The Scroll Lock key can be used as an alternative to the Left
Ctrl key.
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Basic Hotkey Commands
Hotkeys Function
Left Ctrl, Left
Ctrl, 1, 2, 3 or 4
Left Ctrl, Left
Switch between the computers
connected to ports 1 - 4.
Start auto scan.
Ctrl, F1
Left Ctrl, Left
Start manual scan.
Ctrl, F2
Left Ctrl, Left
Ctrl, F3
Adjust scan rate (The KVM Switch will
beep each time you enter the hotkey up
to 4 beeps indicating the duration of the
scan rate,
1 beep = 3 seconds, 2 beeps = 8
seconds, 3 beeps = 15 seconds, and 4
beeps = 30 seconds.
Left Ctrl, Left
Ctrl, F5
Turns the Audio Stick function On/O.
When Audio Stick is on, audio is synced
to the computer connected to the
current port selection.
Press Left Ctrl, Left Ctrl, A to move the
audio function to the selected port. The
audio will remain on the selected port
until Audio Stick is disabled or the audio
is moved to another port.
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Push Button Control
Selecting a Connected Computer
• Press the Port Select Button 1 - 4 to toggle between the
ports.
Activating Auto Scan
The Auto Scan function allows you to scan through the
computers connected to the KVM Switch in sequence.
• Press and hold Port Selection Buttons 3 and 4
simultaneously.
Note: When a computer is being scan the corresponding
Port LED will ash.
Deactivating Auto Scan
To deactivate Auto Scan in the middle of a scan:
• Press one of the Port Selection Buttons to stop the auto
scan.
Setting Scan Time
You can set the scan time duration used within the Auto Scan
function from 3 seconds to 30 seconds.
• Press and hold Port Selection Buttons 1 and 2
simultaneously.
Note: The KVM Switch will beep each time you enter the
hotkey up to 4 beeps indicating the duration of the scan
rate 1 beep = 3 seconds, 2 beeps = 8 seconds, 3 beeps = 15
seconds, and 4 beeps = 30 seconds.
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EDID Copy
Copying EDID Settings
In some cases display problems may occur due to incorrect
EDID communication between the display and the KVM switch.
The EDID Copy function allows you to copy and store EDID
details from an EDID compliant Display Device to reduces the
risk of the display being incorrectly detected or using the wrong
resolution or refresh rate.
1. Press and hold the EDID Copy Button that is next to the
Console HDMI Port the Display Device you want to copy
EDID settings from, for 6 seconds.
2. Release the EDID Copy Button once the HDMI LED starts to
ash.
Note: The HDMI LED will ash twice indicating that it has
successfully copied the EDID settings from the connected
Display Device.
Auto Learning EDID Settings
Auto Learning allows the KVM to copy EDID details without
storing the EDID settings in non-volatile memory. Once Auto
Learning is activated the KVM Switch will automatically copy
and emulate the EDID details, until a new display is connected
and/or the KVM switch is power cycled.
1. Press and hold the EDID Copy Button that is next to the
Console HDMI Port for the Display Device you want to use
to copy EDID settings from, for 12 seconds.
2. Release the EDID Copy Button once the HDMI LED starts to
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slowly ash.
Note: The HDMI LED will ash 3 times indicating that it has
successfully copied the EDID settings from the connected
Display Device.
Resetting EDID Settings
In order to reset the KVM Switch’s EDID setting back to factory
settings:
1. Press and hold the EDID Copy Button that is next to the
Console HDMI Port for the Display Device you want to use
to copy EDID settings from, for 18 seconds.
2. Release the EDID Copy Button once the HDMI LED starts to
ash quickly.
Note: The HDMI LED will ash 3 times indicating that it has
successfully reset the EDID settings.
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About the LED indicators
The KVM Switch features a Port selection/link LED for each
port, as well as a power LED. For more information about the
LEDs, consult the table below:
LED Behavior Scenario
Power LED Illuminated KVM Switch is
receiving power
Port LEDs
Illuminated
green
Illuminated red Connected
Blinking Auto Scan process is
Connected
Computer is turned
on
Computer is
currently selected
in progress
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Troubleshooting
PC BIOS Change
The following changes may be required for a PC.
1. From on the Standard CMOS Features screen, change
the Halt On/Halt on Error eld to All But Keyboard. The
Halt On/Halt on Error eld, prompts the user when errors
occur during the boot process. Switching this eld to All
But Keyboard, ignores all keyboard errors during the boot
process (e.g. no keyboard detected).
2. From on the PNP and PCI Setup screen, change the PNP OS
Installed eld to Yes. By setting the PNP OS Installed eld
to Yes, only critical devices required for the system boot
process are congured during boot up.
3. Change the USB IRQ eld to Enabled.
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EDID
If you are unable to achieve maximum resolution on your
connected Display Devices or a connected Display Device is
not detected.
1. Press and hold the EDID Copy Button next to the Console
HDMI Port for the Display Device you want to use to copy
EDID settings from, for 18 seconds.
2. Release the EDID Copy Button once the Power LED starts
to ash quickly. The Power LED will ash 3 times indicating
that it has successfully reset the EDID settings.
3. Power cycle the KMV Switch. Disconnect all USB cables from
the KVM Switch. Disconnect the Universal Power Adapter
from the KVM Switch, wait 60 seconds and Reconnect the
Universal Power Adapter to the KVM Switch.
If the KVM Switch looses EDID settings when switching ports
and cannot detect the Display Device.
1. Press and hold the EDID Copy Button next to the Console
HDMI Port for the Display Device you want to use to copy
EDID settings from, for 6 seconds.
2. Release the EDID Copy Button once the Power LED starts
to ash. The Power LED will ash twice indicating that it has
successfully copied the EDID settings from the connected
Display Device.
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Keyboard and Mouse
If the Keyboard and Mouse does not work once connected to
the KVM Switch.
1. Press the corresponding Port Selection Button for the
computer that is having the Keyboard and Mouse issue.
2. With the Keyboard and Mouse connect directly to the Host
Computer, remove all unnecessary keyboard and mouse
drivers.
3. Power o the Computer.
4. Connect the Keyboard and Mouse back to the KVM Switch.
5. With the same Computer selected on the KVM Switch
power on the Computer.
Connected USB Device
If you have recently connected a USB device that is not
responding, try one of the following solutions:
1. Re-install the USB device driver.
2. Add a power adapter to the USB device if the device can be
self powered.
3. Double check USB cable connecting the device to the KVM
Switch.
4. Disconnect the USB device and move it to an available USB
port.
5. Disconnect all USB devices and cables and power cycle the
KVM Switch.
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6. Restart the Computer.
Note: Some HID devices may perform better connected to a
USB HUB port.
Functionality
Port Switching
Note: Some systems may take longer to detect the connected
hardware when switching from one port to another.
If the connected computer hangs up while switching to another
connect computer.
• Wait a minimum of 5 seconds before switching Computers
to ensure proper USB connection.
Note: You may need to unmount or power o connected USB
devices before switching Computers.
Auto Scan
When preforming an Auto Scan the KVM Switch does not
automatically switch to the next computer and beeps.
1. Disable Auto Scan.
2. Ensure that all connected systems are powered up and
accessible.
Note: There must be at least two connected and powered
systems for the Auto Scan feature to work.
3. Power up or reboot any systems which are currently
powered o or not detected correctly.
4. Re-enable Auto Scan.
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Display Device
If there is no video signal when connecting a Display Device to
the Console HDMI Port or when switching ports.
• Make sure that you have plugged a Display Device to the
Console HDMI Port and reboot the Computer while the
KVM Switch is on.
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Warranty Information
This product is backed by a two-year warranty.
For further information on product warranty terms and conditions, please refer
to www.startech.com/warranty.
Limitation of Liability
In no event shall the liability of StarTech.com Ltd. and StarTech.com USA LLP (or
their ocers, directors, employees or agents) for any damages (whether direct
or indirect, special, punitive, incidental, consequential, or otherwise), loss of
prots, loss of business, or any pecuniary loss, arising out of or related to the use
of the product exceed the actual price paid for the product.
Some states do not allow the exclusion or limitation of incidental or
consequential damages. If such laws apply, the limitations or exclusions
contained in this statement may not apply to you.
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