I am having problems with my board. It was OK and I was flying perfectly my plane until yesterday, when I tried to upload the latest firmware 3.4 and when it was about to finish, the message "Upload succeeded but verify failed: exp C got 14 at 0" appeared. (I uploaded firmware with GPS and compass connected).
Now I can´t connect with MP anymore. When I connect USB, the Power led is on, but the ABC leds (red, yellow, and blue) are always off. If I try to upload Firmware the RX and Tx leds blinks.
I tried with another computers, checked the parameters in the COM port, used APM Planner, but nothing works.
I regret I tried to upload the firmware, it was working ok until yesterday! If something works, don't touch it.
Anny suggestions? Sorry if my english is not good.