Hi,
after solving an issue with gps after a crash I now have got a dead mcu. Bad Luck seems to be on my side.
I was connecting 3DR Telemetry to the board and it was working, but at a distance of app. 5m it was loosing connection and regaining connection constantly.
I think I was also disconnecting and connecting gps antenna, because I was looking for gps lock.
Suddenly the board was dead. No power led.
I still have 5 volt, but the 5210 3.3V regulator is very hot and the output is very low. I also have a big voltage drop (> 3V) on R13. The MCU is getting warm as well, so i guess I have a shorted processor.
So my first question:
Is it likely, that the cpu is dead and can it be replaced?
I have read, other people in this forum had replaced the mcu succesfully but I have never soldered a 100pin beast before.
What do i have to do?
My second question:
What could have caused the dead cpu?
When I connect 3DR radio telemtry, do i need a level converter for 3.3V?
(I didnt use on)
Thanks
Chris