Software crash thats why is not loading, try to put it in DFU Mode , if you get it to DFU mode there’s the issue. you can try to update it but it might fail , if you flash it from 3Utools still gonna restore the device
Could be 2 things 1. HDMI port could be damage and that why is not showing image check the pins to make sure. 2. Got into sleep mode and thats guy doesn’t show image, need to re-install software to get this issue fix
could be baseband is giving you issue this might get repair by micro soldering my best suggestion is take it to a professional with micro soldering ( iPad Rehab) and they will fix the issue
i found some help on a website that would help you out if not i will recommend to do a factory reset you would lose all your information but it will take off the voice assistant https://support.sonymobile.com/global-en/xperiam2/kb/023101885505ba55014a44313... good luck and i hope you can get it fix
Hello the IC Audio have to be soldering again no matter how many times you restore or reset device it will stay in the same this is something that 7-7+ are having