Chosen Solution
So i got a iphone for touch ic today and changed u2401 with no problem checked the touchscreen everything seems good but still not responsive so i went on to change u2402 after i changed this it will not power on I am so confused right now so any help would be appreciated
Go back to where it last worked. Remove U2402, make sure there are no bridges or components knocked off their pads… try to power up without the u2402 and see if you have power, if not, then remove u2401. Before putting back the IC’s make sure pads are cleaned up and nothing is bridged and you have a good reball on both IC’s. Then, make sure you run the M1 jumper on U2402 before placing it back. U2402 is the problem with no touch the majority of the time with u2401 the main cause of the grey flickering bar on top Feel free to ask any questions
