proximity sensor not working

I have exact the same problem, sensor doesn't work, when I want to make a call the phone just turns off and also, my micro does not work, only when I turn it on speaker it works. (replaced the screen)

i just delete htc gallery update and it works correctly now

Hello folks, i think i solved this issue ... i have a htc m8, just like all of you .. I had a extra battery so i was like. okay its time to replace this one and use this "new" battery i have for this phone. I saw so many videos on internet about tearing it down ( i had exp opening stuff before) I did it without problems actually. When i finished, i found myself with no sensors at all... none of them .. after some hours of digging. I noticed that this problem came along "display replacement, and battery replacement" .. later i found that all the sensors are in the display itself.. Then i opened it again and swaped the old battery and make sure i did connect everything. When I finished, i find myself with the same problem.. and a new one.. my screen was blinking rapidly ... i was like, rlly bro ... so i opened it again for third time.. and this time i saw something i ignored before... every ribbon was protected with a special tape, which is metalic like in the upside, they lost its glue and became loose, so i glued with a soft glue them back in place, for what i know, they do a job, something with faraday cage .. after i secured every "Tape" of this... i closed back my phone and TADAHH... i recovered almost every sensor xD ... my gyroscope is kinda weird. takes sometime to respond.. but i will leave it like that. most important for me was the light sensor and proximity sensor which are working perfectly ... well guys, that was my experience with this phone.. for those who are brave enough to open this challenger phone.. pay attention to these details i said before, and maybe you will get your sensors back.... thanks for your time.. i just made an account to help with this issue

brothers,the problem is of either lcd or touch which you had repalced or with small tiny rubber internally fixed on proxity sensor in your mobile.so please once check if you are able to open your mobile that if there is a rubber on proxity sensor ornot.if not then you have to fix the same rubber on it.if rubber presents then also not working then you have to once remove the touch and clean the panel seating base and fix the touch neatly.that may solve your screen off problem...if not then replay me on gayazkhan1@gmail.com