How and where do you get this replacement part from DJI ?

I have the exact same issue

Thanks for this good guide!

I was trying to know the correct voltage of the battery on step 10. Mine is 1.8 Volt

My Nexus S is not booting anymore. I had to reboot multiple times to have a chance to boot but actually it's dead.

The problem is that it cannot mount sd card.

I'll try to put the PCB in a oven to repair this.