Specifications

724-746-5500 | blackbox.com
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ACS253A-CT
Chapter 7: Troubleshooting
Problem: Colored areas of the screen look like an oil film.
Possible Cause/Solution: In some circumstances, the Extender’s internal video processor may lose its firmware. In this case, it is
necessary to reset the unit. A power cycle is NOT sufficient! Please use the OSD to make a factory reset.
7.2 Keyboard and Mouse
Problem: The keyboard or mouse doesn’t work.
Possible Causes/Solutions:
Is there a picture? If not, check the solutions suggested in the previous section.
If the picture is OK, check that the model of mouse or keyboard is supported.
Problem: The mouse pointer doesn’t move when I move the mouse.
Possible Causes/Solutions: Is the other console currently active (see Access Switching, Section 3.4)? In a dual-access system, the
Local unit initially has control each time you boot up the system or power cycle the remote unit. You will also observe this effect
at one console when the other console has been in use.
If you want to get control at a console, you have to either press any key on the keyboard or, optionally, press the left and right
mouse buttons simultaneously (this is determined by a jumper setting, see Appendix C: System Upgrade & Dual Access). To make
a console active, we suggest you press and release one of the Shift keys since this will not affect the current PC activity.
NOTE: You cannot gain control if the other console is in use or until the inactivity timeout period has expired.
7.3 Contacting Black Box
If you determine that your ServSwitch KVM Extender DVI/VGA is malfunctioning, do not attempt to alter or repair the unit.
It contains no user-serviceable parts. Contact Black Box Technical Support at 724-746-5500 or [e-mail].
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.
7.4 Shipping and Packaging
If you need to transport or ship your ServSwitch KVM Extender DVI/VGA:
• Package it carefully. We recommend that you use the original container.
• If you are returning the unit, make sure you include everything you received with it. Before you ship for return or repair,
contact Black Box to get a Return Authorization (RA) number.