[beagleboard] Beagle board xm Rev C HDMI/LAN/USB not responding

The USB HUB has sustained damage and no longer functions.

Gerald

It could be dozens of things, 5 of which I would never even think of. USB and LAN come from the same chop. It sounds like the monitor or adapter you are using is tryig to send out 5V on the same pin we send 5V out on. I would find another adapter or monitor that works correctly and does not send out the 5V. Or you could remove the PTC on the board to prevent this.

You can request an RMA and get repaired.

beagleboard.org/support/rma

Gerald

Feel free to look at the schematics and SRM. The HUB has four USB ports and one Ethernet port on it. That is the way it works. The connections act weird because weirdness could be a result of damage to the board. It may still work if you remove the PTC. The weirdness sounds to me to be from the HDMI putting 5V into our 5V causing weirdness. You should not connect two voltage sources together.

Gerald