phone can't be detected at all
semcboot somehow got damaged, while it is never touched by any process.
procedure to fix:
1. select correct model
2. on settings check "signed mode"
3. add erom to firmware tab.
if you have neptune based phone: 1207-7713_EROM_S1_NEPTUN_HS_SEMC_SIMLOCK_R7A024.sin
if you have locosto based phone, then select situable from:
J132_EROM_S1_LOCOSTO_HS_USB_R5A038_64k.sin
K330_T280_T270_EROM_S1_LOCOSTO_HS_R5A028.sin
R300_R306_T303_S1_LOCOSTO_HS_R5A031_128.SIN
T250_CXC1250616_EROM_S1_LOCOSTO_HS_R5A022.sin
Z250_Z320_EROM_S1_LOCOSTO_HS_R5A023.sin
4.press recovery
check if phone trim area/simlock are okay by doing identify.
repair simlock or trim area if needed.