Planet Technology 85M Powerline to Ethernet Bridge with 4-Port Switch PL-420 - Manual (Page 15)

The Main tab shows the powerline units that are connected to the current
computer and other powerline devices on the home network, and it will
also display Mac Address of each device.
**Note** If you do not see ANY unit in the device status but the powerline
device does exist, try to press “Scan” button or unplug all devices and
plug them back. Meanwhile, please make sure the cable is the right type
and working correctly. If all seems to be correct, and you still receive
nothing in the Device window, try rebooting your computer.
Part 2: Diagnose a Network Powerline device
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