Even connecting two systems together (on a 4 port switch) gives me problems - I lose video when I switch between them. It does not matter, in the OS, outside the OS - the same problems. This switch appears to work only when the system is powered on with the port selected. Any port switching while the device is powered on will result in a loss of signal. According to tech support, if this doesn't work, you're using poor quality cables. You have NO OTHER troubleshooting steps. That's all.
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