Hi There Its Best TO Dissemble to The Phone And Look For Damages Also Please Describe What You Did For Fixing Touch Id As It May Shed Some Light On What Has Happened May Be During Your Attempt To Repair Touch Id You Accidentally Damaged Components Or Created A Short To Ground Which May Be The cause Of Power Chip Heating Up Use Can You Use http://Phoneboard.co Software to Pinpoint The Location Of Heat

Hi There, Firstly Understand This:- This Phone Comes with AMOLED(LED) Screen With In-Display Fingerprint Sensor There Could Be 2 Scenarios 1rst) In Market There Are Two Types Of Aftermarket Screens For This Phone Namely LCD And LED, LCD Is Cheap And And Does Not Support In Display Fingerprint Sensor, In Your Case Its Possible That The Vendor Charged You For LED Which Is Costly But Instead Installed LCD .If This Is The Case Contact The Vendor To Rectify It 2nd) IF Vendor Installed The LED Then Fingerprint Sensor Needs To Be Calibrated In Accordance With New Display, For Calibration You Need To Visit Service Center As Calibration Is Not Possible In Aftermarket

Hi There, As You Said The Phone Is Powering On And Getting Hot First Check If The LCD Itself Is Not The Culprit By Installing Working One, Afterwards There Could Be 2 Scenarios 1st) The Phone Is Still Powering On But LCD Backlight Circuit Has Failed Causing Heat And No Graphics On Display 2nd) The Phone Dead Due To Short To Ground On The PCB And Getting HOT(In This Case Also The LCD Backlight Circuit Has Failed Causing Short) To Check Disassemble The Phone And Take Out The PCB Do As Followed:- Use Multimeter In Diode Mode ,Attach Positive Probe To Ground (Any Metal Shield On PCB) And Use Negative Probe To Take Reading From The Points Shown In Pictures, Reading Fluctuations +/-50 is Normal Above It Is Abnormal And 0 Short To Ground. I Have Mentioned Correct Reading For Reference You Can Use This Software Also For Reference :- https://phoneboard.co/ Post Results Afterwards, I Will Be Happy To Help

Your Phone Is Discharging At High Rate Which Is Sign Of Leakage Of Current Within PCB Of The Phone Battery Is Not The Culprit, You Can Check it:- Disassemble The Phone :- https://www.youtube.com/watch?v=y1e2J83V... Use Multimeter And Put it on Diode Mode Reading Put Positive Probe To Ground And Use Negative Probe To Check Battery Connector Terminal The Pin Having 0 Reading Is Ground And Positive Pin Should Have Reading Of About 400-480,in Your Phones Case You Will Definitely Have Abnormal Readings Middle Pins Of The Connector Are For Battery Data You Can Use PhoneBoard Software To Look Over Digital PCB Board To Understand it more :- https://phoneboard.co/

@nickbee95 Wireless Charging Coil Is Not included With Back Glass Replacements As it Is Glued to Midframe Not Glass More Over if the Coil Is Damaged Then Wire Charging Will also stop ,so if you can still charge phone via cable then problem is not from coil, Maybe With PCB Or Charger Itself