Topic: Flashing screen after overvoltage
Hi guys, I have a Chumby One I was trying to turn into a robot brain. Some time ago I cut the power cord and added a keyed connector so I can plug it in a microcontroller board. While a friend was working on the software (ssh from a looong distance), Chumby was plugged into the wall and had a Arduino compatible board connected to the USB through a hub, together with a stick for storing the custom data. It worked fine plugged into the wall, but unfortunately I forgot about the input voltage limit and I plugged a 2S LiPo (7.4V) into the connector. Chumby did not start, so I thought I might had reverse polarity and immediately unplugged it. I verified the polarity, it was fine. Only then I turned Chumby over and noticed the 5V marking near the power connector. Ugh... So I plugged the wallwart back and Chumby started, but the screen is flashing, same is the LED on the USB hub. The boot process gets stuck at finding the network, I guess the wireless dongle does not get enough power to work, or it might be damaged. Also, there is a part that gets really hot after a little while, I managed to identify it as U301. After a little longer, other parts near by get hot.
Can anyone let me know which parts might have gone bad and need replacing?
Thank you so much for your time and effort!