Black Box Switch KV9612A User Manual

KV9612A  
KV9614A  
ServSwitch DT Series USB/DVI/Audio KVM Switches  
Control up to two or four PCs, or G3/G4 Mac or Mac Pro computers  
from a single console (USB keyboard, USB mouse, and DVI [Digital Visual  
Interface] monitor, plus audio).  
Share two peripherals between two or four computers.  
Include a built-in hub.  
Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500) •  
FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax  
724-746-0746 • Mailing address: Black Box Corporation, 1000 Park Drive, Lawrence,  
Customer  
Support  
Information  
PA 15055-1018  
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FCC and NOM Statements  
FEDERAL COMMUNICATIONS COMMISSION AND  
INDUSTRY CANADA RADIO FREQUENCY INTERFERENCE STATEMENTS  
This equipment generates, uses, and can radiate radio-frequency energy,  
and if not installed and used properly, that is, in strict accordance with the  
manufacturer’s instructions, may cause interference to radio communication.  
It has been tested and found to comply with the limits for a Class A computing  
device in accordance with the specifications in Subpart B of Part 15 of FCC rules,  
which are designed to provide reasonable protection against such interference  
when the equipment is operated in a commercial environment. Operation of  
this equipment in a residential area is likely to cause interference, in which case  
the user at his own expense will be required to take whatever measures may be  
necessary to correct the interference.  
Changes or modifications not expressly approved by the party responsible  
for compliance could void the user’s authority to operate the equipment.  
This digital apparatus does not exceed the Class A limits for radio noise  
emission from digital apparatus set out in the Radio Interference Regulation  
of Industry Canada.  
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant  
les limites applicables aux appareils numériques de la classe A prescrites dans le  
Règlement sur le brouillage radioélectrique publié par Industrie Canada.  
Normas Oficiales Mexicanas (NOM)  
Electrical Safety Statement  
INSTRUCCIONES DE SEGURIDAD  
1. Todas las instrucciones de seguridad y operación deberán ser leídas antes  
de que el aparato eléctrico sea operado.  
2. Las instrucciones de seguridad y operación deberán ser guardadas para  
referencia futura.  
3. Todas las advertencias en el aparato eléctrico y en sus instrucciones de  
operación deben ser respetadas.  
4. Todas las instrucciones de operación y uso deben ser seguidas.  
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2- and 4-Port ServSwitch DT Series USB/DVI/Audio KVM Switches  
5. El aparato eléctrico no deberá ser usado cerca del agua—por ejemplo,  
cerca de la tina de baño, lavabo, sótano mojado o cerca de una alberca,  
etc.  
6. El aparato eléctrico debe ser usado únicamente con carritos o pedestales  
que sean recomendados por el fabricante.  
7. El aparato eléctrico debe ser montado a la pared o al techo sólo como sea  
recomendado por el fabricante.  
8. Servicio—El usuario no debe intentar dar servicio al equipo eléctrico más allá  
lo descrito en las instrucciones de operación. Todo otro servicio deberá ser  
referido a personal de servicio calificado.  
9. El aparato eléctrico debe ser situado de tal manera que su posición no  
interfiera su uso. La colocación del aparato eléctrico sobre una cama, sofá,  
alfombra o superficie similar puede bloquea la ventilación, no se debe  
colocar en libreros o gabinetes que impidan el flujo de aire por los orificios  
de ventilación.  
10. El equipo eléctrico deber ser situado fuera del alcance de fuentes de calor  
como radiadores, registros de calor, estufas u otros aparatos (incluyendo  
amplificadores) que producen calor.  
11. El aparato eléctrico deberá ser connectado a una fuente de poder sólo del  
tipo descrito en el instructivo de operación, o como se indique en el  
aparato.  
12. Precaución debe ser tomada de tal manera que la tierra fisica y la  
polarización del equipo no sea eliminada.  
13. Los cables de la fuente de poder deben ser guiados de tal manera que no  
sean pisados ni pellizcados por objetos colocados sobre o contra ellos,  
poniendo particular atención a los contactos y receptáculos donde salen  
del aparato.  
14. El equipo eléctrico debe ser limpiado únicamente de acuerdo a las  
recomendaciones del fabricante.  
15. En caso de existir, una antena externa deberá ser localizada lejos de las  
lineas de energia.  
16. El cable de corriente deberá ser desconectado del cuando el equipo no sea  
usado por un largo periodo de tiempo.  
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NOM Statement  
17. Cuidado debe ser tomado de tal manera que objectos liquidos no sean  
derramados sobre la cubierta u orificios de ventilación.  
18. Servicio por personal calificado deberá ser provisto cuando:  
A: El cable de poder o el contacto ha sido dañado; u  
B: Objectos han caído o líquido ha sido derramado dentro del aparato; o  
C: El aparato ha sido expuesto a la lluvia; o  
D: El aparato parece no operar normalmente o muestra un cambio en su  
desempeño; o  
E: El aparato ha sido tirado o su cubierta ha sido dañada.  
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2- and 4-Port ServSwitch DT Series USB/DVI/Audio KVM Switches  
TRADEMARKS USED IN THIS MANUAL  
Black Box, the Double Diamond logo, and ServSwitch are trademarks or regis-  
tered trademarks of BB Technologies, Inc.  
Linux is a registered trademark of Linus Torvalds.  
IntelliMouse, Microsoft, Windows, Windows NT, and Windows Vista are either  
registered trademarks or trademarks of Microsoft Corporation in the United  
States and/or other countries.  
Mac is a registered trademark of Apple Computer, Inc.  
Any other trademarks mentioned in this manual are acknowledged to be the  
property of the trademark owners.  
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Table of Contents  
Chapter  
Page  
1. Specifications ..............................................................................................6  
2. Overview ..............................................................................................7  
2.1 Introduction........................................................................................7  
2.2 Features ..............................................................................................7  
2.3 Components.......................................................................................8  
2.3.1 KV9612A Front Panel ............................................................8  
2.3.2 KV9612A Rear Panel .............................................................9  
2.3.3 KV9614A Front Panel ..........................................................10  
2.3.4 KV9614A Back Panel...........................................................11  
2.4 What’s Included................................................................................12  
2.5 What You’ll Need to Supply..............................................................12  
3. Installation ............................................................................................13  
3.1 ServSwitch Placement.......................................................................13  
3.2 Hardware Installation........................................................................14  
3.2.1 Connecting the Console Keyboard, Mouse, and Monitor ...14  
3.2.2 Connecting the Computers.................................................15  
3.2.3 Initial Power On...................................................................16  
4. Operation  
............................................................................................17  
4.1 Powering Up the System...................................................................17  
4.2 Selecting Computers Using Front-Panel Buttons...............................17  
4.3 Selecting Computers Using Hotkey Commands................................17  
4.4 Alternate Hotkey Commands............................................................19  
4.5 Function Button (4-Port Only)...........................................................19  
Appendix. Troubleshooting...............................................................................21  
A.1 Problems/Causes/Solutions...............................................................21  
A.2 Calling Black Box...............................................................................23  
A.3 Shipping and Packaging....................................................................23  
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2- and 4-Port ServSwitch DT Series USB/DVI/Audio KVM Switches  
1. Specifications  
Hotkeys: Yes  
Resolution: 1920 x 1200 @ 60 Hz  
Supported Operating Systems: Windows® 98 SE/Me/2000/XP, Windows  
Vista®, Mac® OS X, Linux®  
User Controls: KV9612A: (1) port button;  
KV9614A: (4) port buttons (labeled 1–4) also used for Scan time buttons  
and AutoScan, (1) function button  
Connectors: Both models: (1) Power;  
KV9612A: Console end: (1) DVI-I, (4) USB Type A, (2) 3.5-mm jacks for audio  
(speaker and microphone);  
Computer end: (2) DVI-I, (2) USB Type B, (4) 3.5-mm jacks for audio  
(speaker and microphone);  
KV9614A: Console end: (1) DVI-I, (4) USB Type A, (2) 3.5-mm jacks for audio  
(speaker and microphone);  
Computer end: (4) DVI-I, (4) USB Type B, (8) 3.5-mm jacks for audio  
(speaker and microphone)  
Indicators: KV9612A: (2) Port, (2) Power;  
KV9614A: (4) Port, (4) Power for CPUs, (1) Power for switch  
Temperature Tolerance: Operating: +32 to +104° F (0 to +40° C);  
Storage: -4 to +140° F (-20 to +60° C)  
Power: From the interface or via a 9-12-VDC, 1.5-A power supply (included)  
Size: KV9612A: 1.6"H x 4.9"W x 2.8"D (4 x 16 x 7 cm);  
KV9614A: 1.7"H x 8.7"W x 5.1"D (4.3 x 22 x 12.8 cm)  
Weight: KV9612A: 1.5 lb. (0.7 kg)  
KV9614A: 2.2 lb. (1 kg)  
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Chapter 2: Overview  
2. Overview  
2.1 Introduction  
The 2- or 4-Port ServSwitchUSB/DVI/Audio KVM Switch enables you to con-  
trol up to two or four PCs, or G3/G4 Mac or Mac Pro computers from a single  
console (USB keyboard, USB mouse, and DVI [Digital Visual Interface] monitor,  
plus audio). You can use it to share two peripherals—plus a keyboard and  
mouse—among up to four computers. It supports Microsoft® IntelliMouse® and  
other mice.  
Setup is fast and simple, and no configuration software is needed. Its small  
desktop footprint makes it ideal for on or under your desktop. Use the front-panel  
buttons on the ServSwitch™ to select ports or start AutoScan. The front-panel  
LEDs will light with the corresponding active port when switching between the  
computers. The AutoScan function allows you to automatically scan and monitor  
all computers, one by one, that are connected to the ServSwitch.  
2.2 Features  
• Supports DVI single link with resolutions up to 1920 x 1200 @ 60 Hz.  
• Two or four computers share up to four different USB peripherals  
(keyboard and mouse are included in this count).  
• Select computers via front-panel buttons or hotkeys.  
• Adjust the video signal strength using the front-panel FUNC button (4-port  
only).  
• Select the audio via hotkeys.  
• Needs no drivers for keyboard and mouse operation.  
• Supports keyboard and mouse plug-and-play.  
• Buzzer sound confirms computer switching.  
• Press front-panel buttons to activate AutoScan (4-port only).  
• Selectable scan time interval.  
• Supports one DVI monitor.  
• Self-powered USB operation.  
• No software required.  
• Hotkey functions allow easy computer access.  
• Supports Windows, Mac, and Linux® host systems.  
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2- and 4-Port ServSwitch DT Series USB/DVI/Audio KVM Switches  
2.3 Components  
2.3.1 KV9612A Front Panel  
Figure 2-1 shows the 2-Port ServSwitch DT Series front view. Table 2-1 describes  
the components numbered in the illustration.  
1
3
2
2
3
Figure 2-1. The 2-Port ServSwitch DT Series front-panel view.  
Table 2-1. KV9612A front panel components.  
No. Component  
Description  
1
2
Port selection button  
Port LEDs  
Press button to select a computer.  
The right LEDs light to show the port that is  
currently selected.  
3
Power LED  
Lights when the connected computer is pow-  
ered on.  
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Chapter 2: Overview  
2.3.2 KV9612A Rear Panel  
Figure 2-2 shows the 2-Port ServSwitch rear view. Table 2-2 describes the com-  
ponents numbered in the illustration.  
7
6
4
9
10  
9
5
8
8
Figure 2-2. The 2-Port ServSwitch back-panel view.  
Table 2-2. KV9612A rear-panel components.  
No. Component  
Description  
4
5
Power connector  
Connects to a 9–12-VDC, 1.5-A power supply.  
Console USB Type A  
ports  
Keyboard and mouse ports for console.  
Also two ports for peripherals.  
6
7
8
Console DVI port  
Attaches to the user monitor.  
Computer DVI ports  
Connect to a computer’s video cards.  
Computer USB Type B  
ports  
Keyboard/mouse/peripheral ports for  
computers.  
9
Computer audio ports  
Console audio ports  
Speakers and microphones connect here.  
Speaker and microphone connect here.  
10  
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2- and 4-Port ServSwitch DT Series USB/DVI/Audio KVM Switches  
2.3.3 KV9614A Front Panel  
Figure 2-3 shows the 4-Port ServSwitch DT Series front view. Table 2-3 describes  
the components numbered in the illustration.  
3
5
4
1
2
Figure 2-3. The 4-Port ServSwitch DT Series front-panel view.  
Table 2-3. KV9614A front-panel components.  
No. Component  
1, 2 Port selection buttons  
Description  
Press buttons 1–4 individually to select a com-  
puter.  
1
Scan time buttons  
Press buttons 1 and 2 together to change the  
Scan time interval. The unit beeps 1, 2, 3, or 4  
times for scan times of 3, 8, 15, or 30 seconds,  
respectively.  
2
Autoscan buttons  
Port LEDs  
Press buttons 3 and 4 together to start  
Autoscan.  
3
The top four LEDs (next to the port selection  
buttons) light when the connected computer  
is powered on. The bottom four LEDs light to  
show the port that is currently selected.  
Lights when power is on.  
4
Power LED  
5
Function button  
Adjusts video signal strength or selects audio  
signal. See Section 4.5.  
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Chapter 2: Overview  
2.3.4 KV9614A Rear Panel  
Figure 2-4 shows the 4-Port ServSwitch rear view. Table 2-4 describes the com-  
ponents numbered in the illustration.  
8
9
10  
10  
11  
12  
10  
10 11  
11  
7
11  
6
Figure 2-4. The 4-Port ServSwitch back-panel view.  
Table 2-4. KV9614A rear-panel components.  
No. Component  
Description  
6
7
Power connector  
Connects to a 9–12-VDC, 1.5-A power supply.  
Console USB Type A  
ports  
Keyboard and mouse ports for console.  
Also two ports for peripherals.  
8
9
Console DVI port  
Attaches to the user monitor.  
Computer DVI ports  
Connect to a computer’s video cards.  
10  
Computer USB Type B  
ports  
Keyboard/mouse/peripheral ports for  
computers.  
11  
12  
Computer audio ports  
Console audio ports  
Speakers and microphones connect here.  
Speaker and microphone connect here.  
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2- and 4-Port ServSwitch DT Series USB/DVI/Audio KVM Switches  
2.4 What’s Included  
The package should contain the following items. If anything is missing or dam-  
aged, please contact Black Box.  
• 2- or 4-Port ServSwitch DT Series USB/DVI/Audio KVM Switch  
• Universal power supply, output: 9–12 VDC, 1.5 A  
• Foot pad  
• This user’s manual  
2.5 What You’ll Need to Supply  
• DVI monitor  
• USB enabled computer  
• Microphone and speaker  
• USB keyboard  
• USB mouse  
• KV9612A: 2-Port ServSwitch DT Series USB/DVI KVM Switch Cable  
(EHN900024U -0006, -0009, -0015): These cables connect to PCs that have  
USB and DVI connectors. The cables are available in 6-, 9-, and 15-foot (1.8-,  
2.7-, and 4.5-m) versions.  
• KV9614A: 4-Port ServSwitch DT Series USB/DVI KVM Switch Cable  
(EHN900024U -0006, -0009, -0015): These cables connect to PCs that have  
USB and DVI connectors. The cables are available in 6-, 9-, and 15-foot  
(1.8-, 2.7-, and 4.5-m) versions.  
• Audio cable (EJ110-0002, -0005, -0010, -0015): These cables connect to  
audio and are available in 2-, 5-, 10-, and 15-foot (0.6-, 1.5-, 3-, and  
4.5-m) versions.  
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Chapter 3: Installation  
3. Installation  
PC BIOS NOTE: The following BIOS setup changes are required for PC users but  
not required for Mac users.  
1. In STANDARD CMOS, set HALT ON ERROR to ALL BUT KEYBOARD.  
2. In PNP and PCI SETUP, set PNP OS INSTALLED to YES and set USB IRQ to  
ENABLED.  
NOTE: The KV9612A and KV9614A are set to switch USB keyboard and mouse  
signals from one computer to another. If you plan to share other periph-  
erals such as a CCD camera, printer, or scanner, you must shut down the  
computer’s driver before switching to another computer. Because port  
switching is equivalent to unplugging the USB cable from one computer  
and plugging it into another computer, some USB drivers check the  
attached USB peripherals all the time and are not plug-n-play.  
3.1 ServSwitch Placement  
The 2- or 4-Port ServSwitch DT Series USB/DVI/Audio KVM Switch is small, por-  
table, and designed to fit on a desktop. Consider the following when deciding  
where to place the KVM switch:  
• How long are the cables attached to your keyboard, mouse, and monitor?  
• How far are the computers from the console?  
• How long are the cables you use to connect your computers to the  
ServSwitch?  
CAUTION: Do not place cables near machines that create electrical noise such  
as fluorescent lighting, air conditioning equipment, etc.  
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2- and 4-Port ServSwitch DT Series USB/DVI/Audio KVM Switches  
3.2 Hardware Installation  
This section provides instructions for the basic hardware setup of a single  
ServSwitch.  
CAUTION: Before you begin, make sure that power is turned off to all the  
devices that you will be connecting.  
To prevent damage caused by ground potential differences, make  
sure that all devices are properly grounded. If you don’t follow  
these instructions, your computers and/or the ServSwitch could be  
damaged.  
3.2.1 Connecting the Console Keyboard, Mouse, and Monitor  
1. Power off all computers.  
2. Connect your USB keyboard and USB mouse directly to the USB keyboard  
and mouse ports on the back of the ServSwitch as shown in Figures 3-1 and  
3-2. Attach your DVI cable from your monitor directly to the DVI port. Then  
connect the speakers and microphone to the console’s audio ports.  
3. Connect your USB peripherals (if present) to USB ports 1 and 2.  
Monitor  
Mouse  
Keyboard  
Microphone  
Speakers  
Figure 3-1. KV9612A: console keyboard, mouse, monitor,  
and audio connections.  
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Chapter 3: Installation  
Monitor  
Mouse  
Keyboard  
Microphone  
Speakers  
Figure 3-2. KV9614A: console keyboard, mouse, monitor,  
and audio connections.  
NOTES: The monitor connected to the DVI-I port must be able to synchronize  
with the computer’s video signal. If you are uncertain about the moni-  
tor type, consult the monitor user’s manual.  
3.2.2 Connecting the Computers  
Using the all-in-one DVI cable (EHN900024U-0006 or -0010), connect a com-  
puter to the ServSwitch. Connect the cable’s USB connector to the computer’s  
USB port. Connect the cable’s DVI-I connector to your computer’s DVI-I monitor  
port as shown in Figures 3-3 and 3-4. Connect the USB and DVI-I connectors on  
the other end of the cable to the ServSwitch. Follow the same procedure to con-  
nect the other computers.  
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2- and 4-Port ServSwitch DT Series USB/DVI/Audio KVM Switches  
ServSwitch  
cable  
USB  
computer  
Figure 3-3. KV9612A: computer connection.  
ServSwitch  
cable  
USB  
computer  
Figure 3-4. KV9614A: computer connection.  
3.2.3 Initial Power On  
After connecting the ServSwitch, power on the computers. The ServSwitch will  
get enough power to operate from the computers.  
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Chapter 4: Operation  
4. Operation  
4.1 Powering Up the System  
Once all cables have been connected and all computers have been powered on,  
the ServSwitch emulates mouse and keyboard signals on each port, allowing your  
computer to boot normally. The ServSwitch is now ready for use.  
4.2 Selecting Computers Using Front-Panel Buttons  
You can instantly select any computer by pressing the port selection button(s)  
on the front panel. The corresponding LED lights when the port is selected.  
4.3 Selecting Computers Using Hotkey Commands  
A hotkey command is a short keyboard sequence used to select a computer,  
activate a computer scan, etc. A hotkey sequence starts with two left Ctrl key-  
strokes (in 0.2 seconds) followed by one or two more keystrokes. A built-in buzzer  
generates a high-pitched beep for a correct hotkey command. The buzzer sounds  
one low-pitched beep to indicate an error (in this case, the bad key sequence will  
not be forwarded to the selected computer). Table 4-1 lists hotkey commands and  
their functions.  
To enable/disable the hotkey commands, hold Left-Ctrl + Left-Shift, then press  
Num-Lock + Num-Lock, then release Left-Ctrl + Left-Shift.  
NOTE: Do not use the keypad to the right of the keyboard.  
Table 4-1. Hotkey commands.  
Key Sequence  
Function  
Left-Ctrl + Left-Ctrl + 1 Selects the computer connected to Port 1  
Left-Ctrl + Left-Ctrl + 2 Selects the computer connected to Port 2, etc.  
Left-Ctrl + Left-Ctrl + F1 AutoScan powered on computers one by one  
at a fixed interval  
Left-Ctrl + Left-Ctrl  
Aborts AutoScan  
Left-Ctrl + Left-Ctrl + F2 Enables ManualScan, which enables you to  
switch back and forth between powered-on  
computers.  
Press the <up-arrow> or <down-arrow> key to  
select the previous or the next computer in  
sequence. Press any other key to abort  
ManualScan.  
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2- and 4-Port ServSwitch DT Series USB/DVI/Audio KVM Switches  
Table 4-1 (continued). Hotkey commands.  
Key Sequence  
Function  
Left-Ctrl + Left-Ctrl + F3 To adjust Scan Rate, this command sets the  
duration before switching to the next computer  
in AutoScan.  
The 4-Port ServSwitch DT Series generates 1 to  
4 beeps, indicating a scan interval of 3, 8, 15,  
and 30 seconds respectively.  
Left-Ctrl + Left-Ctrl + F5 Audio Stick: You can link an optional multime-  
dia module to the back of each KVM switch to  
select microphone and stereo speaker signals.  
There are two options for Audio Stick: ON and  
OFF. When set to ON, audio selection follows  
computer selection. When set to OFF, audio  
selection stops following computer selection.  
The ServSwitch beeps once for ON and twice  
for OFF. Use this to listen to a particular com-  
puter’s audio signal while operating other com-  
puters.  
Left-Ctrl + Left-Ctrl + A Press this key sequence to select audio for the  
chosen computer. (Use when Audio Stick set to  
Off.)  
Left-Ctrl + Left-Ctrl + U Press this hotkey to select the USB port (for  
both 2-port and 4-port ServSwitch).  
USB port setting for 2-port ServSwitch:  
Left-Ctrl + Left-Ctrl + F7 Press this hotkey to turn ON/OFF the USB1 and  
USB2 ports on the console side.  
USB port setting for 4-port ServSwitch:  
Left-Ctrl + Left-Ctrl +F7 Press this hotkey to turn ON/OFF the USB1 port  
on the console side.  
Left-Ctrl + Left-Ctrl + F8 Press this hotkey to turn ON/OFF the USB2 port  
on the console side.  
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Chapter 4: Operation  
NOTE: There are two options for USB Port Rule: ON and OFF. When set  
to ON, USB-Port selection follows computer selection. When set  
to OFF, USB-Port selection stops following USB port selection.  
NOTE: Make sure the USB device linking procedure has finished before  
switching to another computer.  
4.4 Alternate Hotkey Commands  
In addition to the Left-Ctrl + Left-Ctrl hotkeys, there are two other hotkey  
sequences programmed into the ServSwitch:  
Hotkey sequence #1: Left-Ctrl + Left-Ctrl + _  
Hotkey sequence #2: Scroll-Lock + Scroll-Lock + _  
Hotkey sequence #3: Hold Left-Shift + Num-Lock + Num-Lock + _  
For keyboards that don’t have or won’t support Scroll Lock, press and HOLD the  
Left-Shift key, and then press the Num-Lock key twice. For example, to select a  
computer:  
Hold Left-Shift + Num-Lock + Num-Lock then release Shift and press 1. This  
selects the computer at Port 1.  
Hold Left-Shift + Num-Lock + Num-Lock then release Shift and press 2. This  
selects the computer at Port 2.  
4.5 Function Button (4-Port Only)  
Use the Function button on the front panel (#5 in Figure 2-3) to adjust the  
video signal strength according to the length or quality of DVI cable. It also selects  
the audio signal from any of the connected computers’ four ports.  
To adjust the video signal strength, follow these steps:  
1. Press the Function button three times.  
2. Press push button #1 one or two times to adjust the selected port’s input  
video strength. One beep = normal or two beeps = enhance.  
or  
Press push button #3 one or two times to adjust the selected port’s output  
current. One beep = normal or two beeps = enhance.  
or  
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2- and 4-Port ServSwitch DT Series USB/DVI/Audio KVM Switches  
Press push button #4 one, two, three, or four times to adjust the selected  
port’s output emphasis. One beep = no pre-emphasis, two beeps = low pre-  
emphasis, three beeps = medium pre-emphasis, or four beeps = high pre-  
emphasis.  
3. Once the setting is finished, press the Function button one time to exit the  
setting.  
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Appendix: Troubleshooting  
Appendix. Troubleshooting  
A.1 Problems/Causes/Solutions  
Problem:  
The keyboard or mouse does not work.  
Cause #1:  
In AutoScan, the keyboard and mouse do not function.  
Solution #1: Press any front-panel button to select a computer, then use the  
keyboard and mouse. See Section 4.2.  
Cause #2:  
Too many keyboard or mouse drivers are installed.  
Solution #2: Remove all unnecessary keyboard and mouse drivers.  
Problem:  
Cause #1:  
A newly installed USB device does not work.  
Improper device driver.  
Solution #1: Re-install the device driver.  
Cause #2:  
The device consumes too much power.  
Solution #2: The device should be self-powered or add a power adapter to  
the device.  
Cause #3:  
The device consumes too much power instantaneously.  
Solution #3: If the device does not have a power jack, add a 9–12-VDC  
power adapter with less than a 1-A current rating to the  
ServSwitch.  
Cause #4:  
Improper device initialization.  
Solution #4: Make sure that the USB cable is well-seated to ensure proper  
communication.  
Cause #5:  
When the ServSwitch works under self-power (you have not  
added a power supply), it supports a maximum of 100 mA as  
specified by USB.  
Solution #5: To remove all power sources to the ServSwitch, unplug all  
USB A-B cables and the power adapter, then start all over again.  
Select the computer by push button, then restart the computer,  
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2- and 4-Port ServSwitch DT Series USB/DVI/Audio KVM Switches  
and try again. See Sections 4.2–4.4.  
Problem:  
The computer hangs up while switching.  
Initializing a device takes too much time.  
Cause:  
Solution #1: Wait at least five seconds before switching the computer for  
proper USB communication.  
Solution #2: Turn off the device driver (not keyboard or mouse) before  
switching the computer.  
Problem:  
Cause:  
AutoScan does not switch a PC automatically and the ServSwitch  
beeps.  
All PCs are off or only one PC is powered on. The scan mode  
works for powered-on computers only.  
Solution:  
Power on the computers.  
Problem:  
Cause:  
The resolution is not good.  
Improper ServSwitch video settings.  
Solution:  
For the 4-port model only, press FUNC to adjust the optimal  
video signal strength according to the length or quality of  
DVI cable. See Section 4.5.  
Problem:  
Cause:  
When users plug and unplug the DVI connector or switch from  
port to port, there is no video signal.  
Some DVI video cards don’t respond to the signal switch simula-  
tions.  
Solution:  
Wait a few seconds, then use the Function button to adjust the  
video signal strength. See Section 4.5.  
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Appendix: Troubleshooting  
A.2 Calling Black Box  
If you determine that your 2- or 4-Port ServSwitch DT Series USB/DVI/Audio  
KVM Switch is malfunctioning, do not attempt to alter or repair the unit. It con-  
tains no user-serviceable parts. Contact Black Box at 724-746-5500; press 1, 2, 2.  
Before you do, make a record of the history of the problem. We will be able to  
provide more efficient and accurate assistance if you have a complete description,  
including:  
• the nature and duration of the problem.  
• when the problem occurs.  
• the components involved in the problem.  
• any particular application that, when used, appears to create the problem or  
make it worse.  
A.3 Shipping and Packaging  
If you need to transport or ship your 2- or 4-Port ServSwitch DT Series USB/DVI/  
Audio KVM Switch:  
• Package it carefully. We recommend that you use the original container.  
• If you are shipping the 2- or 4-Port ServSwitch DT Series USB/DVI/  
Audio KVM Switch for repair, make sure you include everything that came in  
the original package. Before you ship, contact Black Box to get a Return  
Authorization (RA) number.  
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Black Box Tech Support: FREE! Live. 24/7.  
Tech support the  
way it should be.  
Great tech support is just 30 seconds away at  
724-746-5500 or blackbox.com.  
About Black Box  
Black Box Network Services is your source for an extensive range of networking  
and infrastructure products. You’ll find everything from cabinets and racks and  
power and surge protection products to media converters and Ethernet switches  
all supported by free, live 24/7 Tech support available in 30 seconds or less.  
© Copyright 2012. All rights reserved.  
KV9612A, version 2  
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