Black Box ServSwitch DT Series USB/DVI/Audio KVM Switches, KV9612A manual Appendix Troubleshooting

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:  A newly installed USB device does not work.

Cause #1:  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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