Oneplus 5 Screen Freeze | Motherboard Issue | Manufacturing defect

Guys ,

My Oneplus 5 Device is facing Screen Freeze issue from last few months which gets temporary resolved after multiple reboots , sometime single reboot sometime it didn’t wakes up for 2 days. Now after fighting this battle for months my phone is dead. Display works, everything in the phone works (can see notifications getting recieved , battery getting charged, Network reception on place), just my screen doesn’t respond to my touch. As discussed with Oneplus service center , it is a manufacturing defect in motherboard which is faced by many user who have replaced there motherboard during warranty but i started facing it after my warranty expired.

Now i want to know which component in motherboard can cause this issue where everything is working in background , display is working but screen is not responding to touch.

If anyone can crack this one.