Have you used a cut over network cable to make the connection? I have seen some network cables that do not follow the standard color coding for example what comes first the white/orange or the orange. Yes a cut network cable, but used a magnifying glass to look through the clear connector to check colour coding against pins. Pin1 White /Orange, Pin 4 Blue, Pin 7 White/Brown
If possible can you check the connection between the RJ45 connector and the screw terminal in the IR eye for continuity? Checked and fine for all three connected pins
When connected can you measure 5V between Ground and +5V in the screw terminal of the IR eye? Yes
Also when connected can you meassure a voltage around 5V between ground and IR data screw terminal of the IR eye? No, it’s about 0.4V
If yes can you see the voltage changing when pressing a key on the BEO4? Pressing transmit shows momentary change from 0.4V to about 1V
