HighSecLabs SC21H-3 User Manual page 40

Keyboard
Problem: Mouse and keyboard are not working (two channels)
Solutions:

Check that computer USB and video cables are not crossed
i.e. computer #1 video is connected to channel #1 while USB
keyboard and mouse cables are connected to channel #2.
Problem: Keyboard does not work (all channels)
Solutions:

Check that the keyboard you are using is properly connected
to product.

Check that the USB cable between the product and computer
is properly connected.

Try connecting keyboard to a different USB port on
computer.

Make sure the keyboard works when directly connected to
computer, i.e. the HID USB driver is installed on computer;
this may require computer reboot.

It is recommended to use standard USB keyboards and not a
keyboard with an integrated USB hub or other USB-
integrated devices.

If the computer is coming out of standby mode, allow up to
one minute to regain mouse function.

Try a different keyboard.

Do not use a wireless keyboard.
40
Section 4 - Operation
Mouse
Problem: Mouse cursor does not switch from primary to secondary
display.
Solutions: Driver supporting multiple displays was not installed or
not installed properly on computer. Reinstall driver.
Problem: Mouse and keyboard are not working (two channels)
Solutions:

Check that computer USB and video cables are not crossed
i.e. computer #1 video is connected to channel #1 while USB
keyboard and mouse cables are connected to channel #2.
Problem: Mouse does not work (all channels)
Solutions:

Check that the mouse you are using is properly connected to
product.

Check that USB cable between the product and computer is
properly connected.

Try connecting mouse to a different USB port on computer.

Make sure the mouse works when directly connected to
computer, i.e. the HID USB driver is installed on computer;
this may require computer reboot.

It is recommended to use standard USB mice.

If the computer is coming out of standby mode, allow up to
one minute to regain mouse function.

Try a different mouse.

Do not use a wireless mouse.
Problem: both keyboard and mouse are not working (one channel)
Solution: Use computer Device Manager Utility to see product and
solve problem.
2/4 Ports Secure KVM Combiner User Manual