same oled bootloader

[afghanistan]

hello i have a problem i get stuck in the third splash screen i can get to bootloader and but if i try to upgrade it it tells me that i have a connection error but in the corner it shows that usb is connected maby it usb port it has been broken once so i it started when i was in on a buss listening to my music and it suddenly stopped the phone was dead but 2 little lights where flashing so its like jammed or somethingh
i am g3
ispl/spl is 2.26 unlocked