iPhone 6 liquid damage no touch


Originally J2401 was liquid damaged and had to be replaced. After replacement, there was still no touch.
The touch IC was also corroded around C2410 so I ended up replacing U2402 as reflowing didn't help either.

After that, there is still no touch. There was more damage but since the phone is turning on I ignored the rest.
It doesn't look like there are broken lines between the connector and the touch IC. Not that measuring them will be easy.

What should I check. What is required for touch to work?