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KV9622A
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 key-
board and mouse.
Cause #2: Too many keyboard or mouse drivers are installed.
Solution #2: Remove all unnecessary keyboards 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: Improper device initialization.
Solution #3: Make sure that the USB cable is well-seated to ensure proper
communication.
Cause #4: When the ServSwitch works under self-power (residual power from
computer USB ports), it supports a maximum of 100 mA as specified by USB.
Solution #4: 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 and try again.
Problem: The computer hangs up while switching.
Cause: Initializing a device takes too much time.
Solution #1: Wait at least 5 seconds before switching the computer for proper
USB communication.
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