My lg nexus 4 toucrh screen is faulty and I changed it, but it normaly go black out when making calls. So I decided to take it to a repairer, he suggested that we should removed the proximity sensor. After removing the proximity sensor, he on the phone is now showing google and enter booting without end. And we have tried to replaced the file but is not responding to any of the recommeded file. So please what can I do now?