Hello my friend! Sorry for re-oppening this thread after almost 3 months...
My Xperia Z1 C6903 sometimes died with no readon, but i allways let it dry the battery, then it would turn on again.
yesterday same happens, but No charging at all, only red led blinking. So i tried this tutorial, flashed your .sin_file_set well, then flashed appsw, fsp and elabel from my usual ftf that i already flashed twice or 3 times. Now when i connect to the PC, red led lights up for 3 seconds, then it shuts down and nothing more happens :/ any idea? Before dieing, the phone was around 40% battery, already tried to charge it for about 1 hour, still the same... :/