EXP Computer ThinConnect4 - Manual (Page 22)

<12> ThinConnect4
Troubleshooting the Link RX LED
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Make sure there is power to the ThinConnect4 and PC.
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Check if the RJ-45 connector on both ends is secured.
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Verify the Ethernet card installation on the PC.
Double-click “My Computer”, “Control Panel”, “System”
Click “Device manager”.
Select “Network adapter” from the device menu. Click “+” sign on the left.
Please check if there is mark “!” at front of the Ethernet card name.
If there is a “!” mark, the Ethernet card installation is not complete.
See troubleshooting guide in your Ethernet card User manual for more detail
End of 2.5 Cable connection