Then we try to replace the touch IC. Remove the shielding cover on the motherboard. Since there is another soldered shielding cover on the touch IC, we need to grind the shielding cover and then heat to remove. Grind the shielding cover with a Grinding Pen. Please pay attention not to damage surrounding components while grinding.

Tear off the tape after grinding. Disconnect the flex cable. To prevent hard desoldering due to fast heat dissipation, pry up the motherboard with a metal blade.