LevelOne KVM-0811 - Manual (Page 22)

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7. Troubleshooting
1. Ensure that all cables are well seated. Label all of cables with the number for each respective computer to
avoid confusion.
2. The recommended VGA cable distance is 5 meters maximum without ghosting and degradation. Normally,
the cable length is based on driver capacity of your VGA card. If you need longer VGA cable, please use
VGA extender to accomplish your applications.
3. The recommended PS/2 cable distance is 5 meters maximum. Normally, the cable length is based on
driver capacity of your motherboard PS/2 port. If you need longer PS/2 cable, please use PS/2 extender
to accomplish your applications.
4. The Power Jack polarity is center positive and the power adapter need be DC12V, 1A or DC9V, 1A.
5. Don’t press any keys on the keyboard while the selected computer is booting up. Otherwise, it might
cause the keyboard error or keyboard is not detected at PC side.
6. The computer boot up fine, but keyboard doesn’t work
– Make sure the keyboard works when directly plugged into the computer.
– Try a different keyboard, but use only 101, 102 or 104-key keyboard.
7. The Mouse is not detected during PC boot up.
– Make sure the mouse works when directly plugged into the computer.
– Make sure the mouse is a true PS/2 mouse. A combo mouse will work just as long as it is set for
PS/2 mode with the correct adapter. Try a different mouse.
– Avoiding moving the mouse or pressing the mouse buttons when switching ports.
– Avoiding switching ports during shutting down the PC process.
– When you switch one PC port to another PC port, the best scan time setting need to be set to 5 sec.
or more. Normally, the VGA monitor change one resolution mode to another will take one or two
seconds. So, the minimum scan time has fixed in 5 seconds, even user set it as 2 seconds.
8. The power switch is off, but the switch still works fine or power adapter is unplugged from the switch, but
the switch still works fine.
KVM Switch unit draws the power source from power adapter and all PC’s PS/2 port. Some PC’s PS/2
port can support enough power for the switch, but some PC’s PS/2 port ( like laptop, notebook
computer…etc.) is unable to supply enough power for the switch. In order to make sure the system can
work steadily, please do not set power switch to off state or remove the power adapter from the switch.
Although the PCs connected to KVM Switch unit are able to support enough power to the stand alone
switch, KVM Switch unit still needs a power adapter for daisy chain more banks.
9. If forgetting the “ password ” you typed, please contact your supplier.
V1.0