Hello, we have s5 neo, after the end of the call, the phone turned off, at the moment no reaction to charging, only the battery icon appears after turning on.
Try with battery replacement. I had similar symptoms with S4. The phone did not turn on when I connected the charger, zero response, also showed only the battery icon. I replaced the battery and the phone came to life.
On the second battery, I wrote the same wrong, maybe in the previous post, without connecting to the charger, only after pressing powera the battery icon appears.
I would charge the batteries. He took out and inserted the batteries. He pressed the key combinations as for download. And he put the usb cable in the socket. Changed soft.
For example, the newest without brand for today:
Country / Region Poland PDA G903FXXU1BQC1 Product Code XEO CSC G903FOXA1BQC1 Phone G903FXXU1BQC1 6.0.1 Marshmallow (Android) / March 21, 2017
If there is still a partner. Then try hard reset the key combination after the software. After inserting and removing the battery. And soft again. It helped me once.
The phone enters download mode, unfortunately it is not detected by the computer. The second tape with a USB connector was also replaced, with no effects.