Chosen Solution
How do I replace the touch ic chip with a new one?
This is a micro soldering job for experimented technicians . All you need to do is remove the motherboard from the phone, remove the shield that covers the touch ic remove the old chip with hot air, clean the old solder from the board apply flux, position the new chip and apply heat and you are done. ( This is the short version hope @refectio will jump in for a more detailed explanation)
