4. Common Questions for KVM

This article is divided into two parts. The first part is a list of frequently asked questions ( FAQs ) for KVM series products, and the second part is a list of frequently asked questions ( FAQs ) for different models of KVM.

• Part I: list of FAQs for KVM series products
• Part II: list of FAQs for different models of KVM

Part I (list of FAQs for KVM series products)

1. What is a KVM?

A KVM (keyboard, video, mouse) switch is a hardware device that allows a user to control multiple computers from a single keyboard, video monitor, and mouse. Previously KVM's were mostly seen in data centers but in recent years have expanded to the consumer market due to the number of video devices that many homeowners use (computers, streaming devices, game consoles, security systems, etc.)

2. Why do I need a KVM instead of an HDMI switch?

A KVM is different from an HDMI switch by adding the keyboard and mouse functionality. HDMI switches are very inexpensive because they are very limited in functionality. If a computer is one of the many inputs that need to be managed, a KVM will be the preferred device.

3. Who uses a KVM?

Anyone who needs to manage more HDMI inputs than what their TV or computer monitor allows will benefit from a KVM. Also, users of multiple PCs have a need for a KVM switch as it eliminates the need to have multiple peripherals and monitors.

4. Can I use a wireless mouse/keyboard?

Yes. If you have issues with functionality, please try the USB 2.0/3.0 port. Please note that using the USB 2.0/3.0 port will disallow keyboard hotkeys for switching. Only dedicated keyboard/mouse ports have hotkey functionality. 

5. Can I use a Bluetooth keyboard/mouse?

No, the KVM does not have built-in Bluetooth. Therefore any Bluetooth device will bypass the KVM and connect directly to the computers. For example, the Apple Magic Mouse and Magic Keyboard will not connect to the KVM. If you can connect the device to a USB dongle and then connect this to the USB 2.0/3.0 port of the KVM it could work. If it is a 2.4G Hz USB wireless receiver, it can also be connected to the keyboard and mouse dedicated port to use.

6. When I have many USB devices that need to be connected to the KVM Switch, can I connect them to the dedicated mouse & keyboard ports?

No, you can't. Dedicated mouse & keyboard ports should not be used for other types of USB devices.

You can connect a powered USB hub to the USB 2.0/3.0 interface to expand the number of USB 2.0/3.0 ports and connect your USB devices to the USB Hub.

7. What if my keyboard does not have a scroll lock button? 

Keyboards that do not have a scroll lock button like Apple dedicated keyboards will need to change the hotkey command to the [Right CTRL] button. You can make this change by holding down the select button for about 15 sec (or until the KVM beeps). Or using the command [Scroll Lock+Scroll Lock+F1] using another compatible keyboard. Right Ctrl is now the hotkey command.

Please note that the following models do not support changing the hotkey: HKS801-E23 (Previously HKS0801A1U), HKS801-L23 (Previously HKS0801A30), HKS1601-E23 (Previously HKS1601A1U), HKS1601-L23 (Previously HKS1601A10). 

8. Can I use dual monitors?

Yes, here are our options for Dual Monitor KVMs. Each computer needs 2 video connections for the dual monitors to work. Whichever one needs the least amount of adapter is the best option.

9. Can I use a single monitor with dual monitor KVM?

Yes, it's not an issue. 

10. Can I connect to vga / dvi / DisplayPort?

Yes.

11. Do the KVM switches support ultrawide monitors?

Yes. They support all 21:9 and 16:9 monitors.

12. Which keyboards/mice are supported? Is my keyboard compatible?

The second-generation chipset has a wider range of compatibility (A2U) most keyboards have passed our testing. If the keyboard is not compatible then the USB 2.0/3.0 port can be used. All keyboards and mice will work through the USB2.0 port but they will not have hotkey functionality.

13. How do I turn off the audio beep/buzz when switching?

Using the hotkey command: Scroll Lock, Scroll Lock, F11.

14. Why is the remote battery not included & what battery is needed?

Due to robust demand, we typically ship the products airfreight. This has caused issues with hazardous goods regulations. The remote requires a CR2025 battery, which can be found at most convenience and grocery stores. Some of the newer versions of the product have remote controls that use the more common AAA batteries.

15. How do I operate the remote?

Press the number that corresponds to the input that you would like to select. Press “P” to turn on/off the auto scan feature. The remote is designed to be used across several models so only certain buttons will function with your device.

16. I have a Mac keyboard that does not have a scroll lock key. Can I reassign the scroll lock hotkeys?

Most models have the ability to reassign Scroll Lock to Right-CTRL. Please refer to the manuals for the hotkey instructions. All manuals are listed here.

17. Can the switch handle multiple inputs with different resolutions and adapters

Absolutely. Each port is equipped with EDID. The switch will adjust the resolution for each port based on the capabilities of the input device and monitor. If Port 1 has a computer that can only provide 1920x1080, you can also have a computer in Port 2 at 3840x2160. The switch will send the appropriate resolution to the monitor. Likewise, if one computer requires an adapter such as VGA to HDMI, you can continue to use a normal HDMI cable on the other ports.
Please note that your monitor will need to accept 3840x2160 to achieve that resolution.

18. Do the KVM's work with Macintosh computers?

We have tested several Mac computers (2018 Macbook Pro, 2012 Mac Mini, 2008 MacPro) and have not had issues. That said, recent versions of MacOS (since High Sierra and Mojave) limit the refresh rate of external monitors to 30 Hz. The resolution limitation is not an issue with the KVM but a software limitation of Apple's operating system. There are several workarounds posted on the internet. M1 Macs have a single monitor limitation that will require a docking station with display link software to operate dual monitors. We have a video dedicated to this here.

19. How can I be notified of future product firmware improvements?

Please sign up to our newsletter. We respect your right to privacy. We promise not to spam your inbox!

20. How do I make a warranty claim?

TESmart offers a 1 year worldwide warranty, more details can be found in the related article about "Purchase".

If you have any questions or would like to submit a claim please send us a message using the form on the Warranty page.

Part II (list of FAQs for different models of KVM)

1. HKS202-E23 (Previously HKS0402A1U）& HDK202-E23 (Previously HDK0402A1U）

• Is this the right KVM for 2 laptops and 2 monitors?

Yes, this Dual Monitor KVM Switch can realize:

- Two monitors display the information of two computers at the same time,

- Two monitors display the information of the same computer. One of the two monitors can be either a copy screen or an extended screen.

• Why can only one monitor display properly, but the dual monitor function cannot be achieved?

• When I use this Switch, can the two monitors display the screens of my two computers separately?

• Why is the resolution of my two monitors so different?

• Why do the hotkeys not work when my keyboard is connected to the USB 2.0/3.0 port?

Hotkeys only take effect on the dedicated mouse & keyboard ports, and cannot be used on the USB 2.0/3.0 port.

• If computer 1 is on monitor 1 and computer 2 is on monitor 2, which sound will I near on the audio/headset jack?

• Will this work with a DVI to HDMI cable from one of the monitors to one of the Switch's HDMI outputs? I have an older monitor that only has DVI and VGA.

Yes. This KVM Switch supports the DVI to HDMI adapter and can transmit video signals perfectly.

3. HKS402-E23 (Previously HKS0802A1U）

• Can I connect 3 laptops to this KVM Switch?

Yes, you can. Up to 4 computers or laptops can be connected. You only need to make sure that your computer or laptop can output dual HDMI signals. After connecting to this KVM, the computer or laptop can have dual monitor functions (main screen + extended screen).

• Can the KVM support 1920x1080/2560x1080/2560x1440/3440x1440/3840x2160？

• Why can only one monitor display properly, but the dual monitor function cannot be achieved?

From the perspective of signal transmission, you must connect two video cables to the KVM, and both output ports of the KVM need to be connected to a monitor.

• Does this model support EDID emulation?

Yes, all input ports of this KVM Switch have EDID emulators, which keep PCs always have correct information, and prevent display settings change while switching input ports.

• Can the USB 2.0/3.0 port be set up in pass-through mode?

The pass-through mode is only valid for the two USB ports dedicated to the keyboard and mouse (the keyboard and mouse are marked next to the ports).

4.DKS402-E23 (Previously PKS0802A10）

• For this model am I able to use both monitors independently? meaning can all connected PCs use both monitors as a single or dual display?

Yes! This Switch supports 2 display modes, you can choose any connected PC to duplicate or extend to 2 monitors or switch any PC to display on any monitor at will.

• Must the keyboard and mouse be connected to the dedicated ports for the keyboard and mouse? Can they be connected to the USB 2.0/3.0 interface?

When connected to the USB 2.0/3.0 interface, the mouse and keyboard can also be used normally. But at this time, the hotkey function will not be available, it can only be used in the keyboard and mouse dedicated port.

• Can the KVM support 1920x1080/2560x1080/2560x1440/3440x1440/3840x2160？

• Does this model support AMD freesync?

Yes, all ports of this model are DisplayPort, which can support G/Sync and Free Sync.

• Does this model support DP memory (EDID)?

This product supports EDID emulators.

5. HKS0201A1U & HKS0401A1U & HKS0201B1U & HKS0401B1U

• Why can't a multimedia keyboard transfer multimedia functions (play, pause, etc.) when using this KVM switch?

This KVM is an old version and does not support complex keyboards and mice. You can use your multimedia keyboard to connect to the USB 2.0/3.0 port of the KVM switch. (Note: Since the USB 2.0/3.0 port does not have USB emulation, the hotkey switching function cannot be used).

If you using a gaming mouse, custom K&M, or multimedia keyboard, We recommend you purchase our new version of KVM.

• Why the display doesn’t have video output?

Please check if the HDMI cable of the input/output is properly connected. The “online” light on the KVM switch indicates the USB connection status.

• Can a USB hub be attached to the USB 2.0/3.0 port?

Yes, you can use a powered USB hub to expand the number of USB 2.0 ports. Please don't connect the USB hub to the dedicated keyboard and mouse port. Dedicated keyboard and mouse ports should not be used for other types of USB devices.

• The remote control received does not contain batteries.

Due to robust demand, we typically ship the products airfreight. This has caused issues with hazardous goods regulations. The remote requires a CR2025 battery, which can be found at most convenience and grocery stores. Some of the newer versions of the product have remote controls that use the more common AAA batteries.

• How to make L/R audio work properly?

Your computer needs to transmit audio over the HDMI connection. If the audio doesn’t work, please select the HDMI output device in the sound settings of your computer.

• How many long cables can I use for the KVM switch?

Tips for HDMI cable length:
- When using 4K@60Hz as an input, it is required that the Input HDMI cable < 3 meters and the output HDMI cable < 5 meters;
-. When using 4K@30Hz as an input, it is required that the Input HDMI cable <5 meters and the output HDMI cable < 10 meters;
-. When using 1080@60Hz as an input, it is required that the Input HDMI cable <10 meters and the output HDMI cable be < 15 meters.

6. HKS201-E23 (Previously HKS0201A2U) & HKS401-E23 (Previously HKS0401A2U)，&HKS201-EB23 (Previously HKS0201B2U) & HKS401-EB23 (Previously HKS0401B2U)

• The LED light of the KVM switch is displayed normally, and the keyboard and mouse work normally. Why the display doesn’t have video output?

Please check if the HDMI cable of the input/output is properly connected. The “online” light on the KVM switch indicates the USB connection status.

• What kind of keyboard and mouse is it compatible with?

The dedicated keyboard and mouse port with emulation emulator has a "pass-through mode", which greatly improves the compatibility of the keyboard. Support multimedia keyboard (with volume increase and decrease, play, pause, etc.), custom keyboard and mouse, wireless keyboard and mouse with dongle. Keyboard software such as Logitech Options, DAS Q, Corsair iCUE, etc. conflicts with the emulation emulator and limits the ability to use dedicated macro keys. We recommend using the KVM’s USB 2.0/3.0 port as a workaround if this software is desired. Please use a USB hub to expand USB connectivity if needed. KVM’s USB2.0 port doesn‘t have emulation programming so that will not recognize hotkey switching commands.

• Can a USB hub be attached to the USB 2.0 port?

Yes, you can use a powered USB hub to expand the number of USB 2.0 ports. Please don't connect the USB hub to the dedicated keyboard and mouse port. Dedicated keyboard and mouse ports should not be used for other types of USB devices.

• The remote control received does not contain batteries.

Due to robust demand, we typically ship the products airfreight. This has caused issues with hazardous goods regulations. The remote requires a CR2025 battery, which can be found at most convenience and grocery stores. Some of the newer versions of the product have remote controls that use the more common AAA batteries.

• How to make L/R audio work properly?

Your computer needs to transmit audio over the HDMI connection. If the audio doesn’t work, please select the HDMI output device in the sound settings of your computer.

• How many long cables can I use for the KVM switch?

Tips for HDMI cable length:

- When using 4K@60Hz as an input, it is required that the Input HDMI cable < 3 meters and the output HDMI cable < 5 meters;

- When using 4K@30Hz as an input, it is required that the Input HDMI cable <5 meters and the output HDMI cable < 10 meters;

- When using 1080@60Hz as an input, it is required that the Input HDMI cable <10 meters and the output HDMI cable < 15 meters.

• Does this work with a Bluetooth keyboard or mouse?

No, the KVM doesn't with Bluetooth.

• The image is blurred when using KVM?

- Reconnect the connector to prevent poor connection of the socket connector.

- Wire quality (HDMI cable requirements comply with HDMI standards)

7. HCK0401A1U

• Does the USB-C input also provide power to the laptop?

KVM's type-C doesn’t support the power supply function. If the laptop has only 1 type-C port and you need to use it for power supply and video transmission at the same time, We recommend connecting an external docking station.

• What kind of keyboard and mouse is it compatible with?

The dedicated keyboard and mouse port with emulation emulator has a "pass-through mode", which greatly improves the compatibility of the keyboard. Support multimedia keyboard (with volume increase and decrease, play, pause, etc.), custom keyboard and mouse, wireless keyboard and mouse with dongle.
Keyboard software such as Logitech Options, DAS Q, Corsair iCUE, etc. conflicts with the emulation emulator and limits the ability to use dedicated macro keys. We recommend using the KVM’s USB 2.0/3.0 port as a workaround if this software is desired. Please use a USB hub to expand USB connectivity if needed.
KVM’s USB 2.0/3.0 port doesn‘t have emulation programming so that will not recognize hotkey switching commands.

• Can a USB hub be attached to the USB 2.0/3.0 port?

Yes, you can use a powered USB hub to expand the number of USB 2.0 ports. Please don't connect the USB hub to the dedicated keyboard and mouse port. Dedicated keyboard and mouse ports should not be used for other types of USB devices.

• The remote control received does not contain batteries.

Due to robust demand, we typically ship the products airfreight. This has caused issues with hazardous goods regulations. The remote requires a CR2025 battery, which can be found at most convenience and grocery stores. Some of the newer versions of the product have remote controls that use the more common AAA batteries.

• How to make L/R audio work properly?

Your computer needs to transmit audio over the HDMI connection. If the audio doesn’t work, please select the HDMI output device in the sound settings of your computer.

• How many long cables can I use for the KVM switch?

Tips for HDMI cable length:

- When using 4K@60Hz as an input, it is required that the Input HDMI cable < 3 meters and the output HDMI cable < 5 meters;

- When using 4K@30Hz as an input, it is required that the Input HDMI cable <5 meters and the output HDMI cable < 10 meters;

- When using 1080@60Hz as an input, it is required that the Input HDMI cable <10 meters and the output HDMI cable < 15 meters.

• Does this work with a Bluetooth keyboard or mouse?

No, the KVM doesn't with Bluetooth.

8. CKS301-E23 (Previously CKS0301A1U)

• Why the display doesn’t have video output?

Please check if the cable of the input/output is properly connected. The “online” light on KVM switch indicates the USB connection status.

• What kind of keyboard and mouse is it compatible with?

The dedicated keyboard and mouse port with emulation emulator has a "pass-through mode", which greatly improves the compatibility of the keyboard. Support multimedia keyboard (with volume increase and decrease, play, pause, etc.), custom keyboard and mouse, wireless keyboard and mouse with dongle.
Keyboard software such as Logitech Options, DAS Q, Corsair iCUE, etc. conflicts with the emulation emulator and limits the ability to use dedicated macro keys. We recommend using the KVM’s USB 2.0/3.0 port as a workaround if this software is desired. Please use a USB hub to expand USB connectivity if needed.
KVM’s USB2.0 port doesn‘t have emulation programming so that will not recognize hotkey switching commands.

• Can a USB hub be attached to the USB 2.0/3.0 port?

Yes, you can use a powered USB hub to expand the number of USB 2.0/3.0 ports. Please don't connect the USB hub to the dedicated keyboard and mouse port. Dedicated keyboard and mouse ports should not be used for other types of USB devices.

• The remote control received does not contain batteries.

Due to robust demand, we typically ship the products airfreight. This has caused issues with hazardous goods regulations. The remote requires a CR2025 battery, which can be found at most convenience and grocery stores. Some of the newer versions of the product have remote controls that use the more common AAA batteries.

• Does this work with a Bluetooth keyboard or mouse?

No, the KVM doesn't with Bluetooth.

9. HKS1601-L23 (Previously HKS1601A10)& HKS801-L23 (Previously HKS0801A30)

• Is the KVM compatible with multimedia keyboards and mice?

These KVM dedicated mouse/keyboard ports limit multimedia features of peripherals. You can use your multimedia keyboard to connect to the USB 2.0/3.0 port of the KVM switch. (Note: USB 2.0/3.0 port does not have USB emulation, so the hotkeys or mouse gestures cannot be used).

• Where can I get the control software and protocol？

You can download by Homepage-Navigation Bar-Support-download.

• Does this KVM support touch screens?

No. Touch data is not received by the KVM switch.

• Does it have a heat dissipation function？

This KVM is equipped with heat sink fins to support heat dissipation.

• Does this KVM have remote access through IP, including monitor, keyboard, mouse, and USB?

It has remote access via IP to change the inputs on the KVM. You can use a KVM extender with it to extend the keyboard, and mouse USB within a limited range.

• Does this 8 port 4K/30Hz KVM support ultrawide monitors?

The 4K/30 model (the KVM in this listing) is not compatible with 21:9.

• Do the USB hub output ports support devices powered by USB?

Yes, it does. In fact, powering external USB devices is preferred if they have a large amount of power draw.

10. HKS1601-E23 (Previously HKS1601A1U)& HKS801-E23 (Previously HKS0801A1U)

• What kind of keyboard and mouse is it compatible with?

The dedicated keyboard and mouse port with emulation emulator has a "pass-through mode", which greatly improves the compatibility of the keyboard. Support multimedia keyboard (with volume increase and decrease, play, pause, etc.), custom keyboard and mouse, wireless keyboard and mouse with dongle. Keyboard software such as Logitech Options, DAS Q, Corsair iCUE, etc. conflicts with the emulation emulator and limits the ability to use dedicated macro keys. We recommend using the KVM’s USB 2.0/3.0 port as a workaround if this software is desired. Please use a USB hub to expand USB connectivity if needed. KVM’s USB2.0 port doesn‘t have emulation programming so that will not recognize hotkey switching commands.

• Where can I get the control software and protocol？

You can download by Homepage-Navigation Bar-Support-download.

• Does this KVM support touch screens?

No. Touch data is not received by the KVM switch.

• Does it have a heat dissipation function?

This KVM is equipped with heat sink fins to support heat dissipation.

• Does this KVM have remote access through IP, including monitor, keyboard, mouse, and USB?

It has remote access via IP to change the inputs on the KVM. You can use a KVM extender with it to extend the keyboard, and mouse USB within a limited range.

• Does it have a heat dissipation function?

This KVM is equipped with heat sink fins to support heat dissipation.

• Does this 8/16 port 4K/60Hz KVM support ultrawide monitors?

The 4K/60 model (the KVM in this listing) is compatible with ultrawide monitors (21:9). The 4K/30 model (another listing) is not compatible with 21:9.

• Do the USB hub output ports support devices powered by USB?

Yes, it does. In fact, powering external USB devices are preferred if they have a large amount of power draw.

11. DKS201-E23 (Previously PKS0201A10)，& DKS401-E23 (Previously PKS0401A10)

• Will this work with a pluggable docking station?

It depends on the pluggable docking station you use. If your computer and monitor are perfectly compatible with this pluggable docking station, it can also be compatible with our KVM.

• What kind of battery does this take for the remote?

Due to robust demand, we typically ship the products airfreight. This has caused issues with hazardous goods regulations. The remote requires a CR2025 battery, which can be found at most convenience and grocery stores. Some of the newer versions of the product have remote controls that use the more common AAA batteries.

• Does this support EDID emulation (to prevent Windows from thinking I disconnected the monitor every time I switch)?

Currently, the PKS0201A10 product does not support EDID emulation and the PKS0401A10 model supports EDID emulation (if you have any questions, please contact customer service to obtain the latest version).

• Can this item be reversed? If I have one computer, can I switch from my single input to my productivity monitors and then switch to my gaming monitor?

No, this model does not support dual monitor switching (not reversible). It only has one display port output.

• Does it switch with a keyboard shortcut or a peripheral?

The most popular way to switch is with the keyboard shortcut: Scroll Lock+ Scroll Lock+# input. If the user prefers to use a different key, they can change it to Right-CTRL +Right-CTRL+# input. The device can also switch with the push buttons on the front panel, and a mouse gesture (double-tapping the side of the screen with the mouse).

• Is it compatible with MST/dp splitter?

Unfortunately no. This switch does not support MST.

• Could this support a 1440p@120Hz monitor? I'd like to be able to switch my keyboard/mouse and monitor between a Surface dock (work) and my desktop.

Yes. We have recently confirmed that you can get 1440p with up to 144Hz refresh rate with this unit.

• Does the KVM support a USB splitter? I have more than the allotted peripheral slots on my TESmart KVM and would love to fix that.

Yes, you can connect a USB hub to that additional USB 2.0/3.0 standard port. It is recommended that you use a hub with an independent power supply. The power supply of KVM is not enough to support mechanical hard drives and other devices.