turn on mo,increase mo lang to max ung volume using the volume keys. dapat mag sosound siya while booting.to confirm kung nagboot randomly touch the screen after,kung may respond siya,kunyari nagdial tapos my dial sound,edi screen nga issue.. kung wala naman talagang response after mo na turn on, try mo iflash ung stock firmware,kung wala ka search ka online,check mo muna kung meron firmware sa manufacturer's website