After a fall stop working

In this case I speak of a Essential 2 JBL, the main plate is a 40-Flipse-MAE4G, the button plate (play, vol+, vol- and bt) 40-Flipse-kyb2g, and that of Power and battery level is a 40-Flipse-Leb2G, the microcontroller in charge of interpreting the signals of the buttons is the buttons STM8S005C6T6, after making a restart, of the chip, which is connecting the charger and pressing Play and Vol+, only responds to the Vol+ and Vol- buttons, the Play button and the BT button, do not respond to pressing them and only sounds music with the auxiliary. The symptoms before the reset were, that at the time of wanting to light the horn, it did not turn on and only when connecting the charger, automatic lit the Power button, and showed the battery levels; More than no button reacted, and only music sounded with the auxiliary.

The behavior of the buttons after the reset: the buttons close the circuit and everything, even when I press them shows me the level of load (after a few seconds it does not show the load level but the device works, I will assume that it is a factory program) and after doing what you tell me nothing, the difference is that when I press the buttons that do work to raise and lower volume in automatic it shows me the level of load and with these level of load and That I let go of the load level (not when I press them, it shows me the load level, until I let them go; said otherwise shows battery only while they are pressured, until I stop pressing them, only there it shows it) with the other nomas I press and quickly show them, these until stop pressing, therefore the BT and Play button do not make their work, not if it is relevant, what can be happening?

I leave the MCU Datasheed (STM8) Stm8s005c6