I have flashed the unit several times, have reflowed my soldering joints, looked for bridging on the SMDs, never saw any magic smoke and sill don't get any TX/RX lights when I plug the unit to my computer's LAN port. I do get the power light to come on. Several folks looked it over at the Academy and we re-flashed it there using the HEX file off of a working unit and still nothing. Has anyone else had this same issue?