I was playing with my Arduino Yun last night, and got the wireless working, I could program and upload sketches via wifi and everything was great.
When I got back to it this morning, I created a small power supply (9 volt battery, 7805 voltage regulator) to try and run the Yun away from the computer. When I plugged it in, the green power light turns on, but it won't connect to wiki. It won't create it's own network, it won't accept Ethernet connections...
I've plugged it back into the computer, so it's being powered by USB again, still nothing. I've tried plugging the Ethernet cable straight into the computer, as well as straight to the router, and I cannot access the web interface. I've searched through the routers DCHP clients table, and the Yun's IP address never appears.
When I power on the Yun, the USB light flashes once, then the green power light is solid. If I press the 32U4 reset, the RX LED will flash. If I double press the 32U4 button, the red L13 LED pulses 14 times, then the yellow RX LED flashes once.
I can still upload sketches, I've tried the YunSerialTerminal, but nothing.
My conclusion is I have somehow bricked the networking part of the Yun.
Any ideas for how to fix this? I've been searching forums and fighting with this all day, finally I have to ask. I've done what I can on my own, time to call in reinforcements!