Perhaps I didn't understand what you posted but did you say that the green light on the board did not light. If not, perhaps it may be in backwards. As for the magjack, at least the green light should have lit, data or not. How are you connecting to the PC. If it is a direct connection then you may need a crossover cable. Many modern PC's can autoconfigure their Ethernet port for the send and receive pairs but there are still some cards that don't. If you have a network switch, try plugging the Etherdongle into it. It doesn't matter if data is there or not, we are just looking for the green light to light on the magjack. If it lights up, that gives an indication that the Etherdongle is alive. If not, then there is an issue and as requested by rm375, post some CLEAR closeup pictures of both sides of the board in good light.