Repairproblem( backscreen) after waterdamage

Hello,

I'm wondering if anyone has a clue where to look on PCB with these sympthoms.

I did repair a waterdamage 5s , replacing shorted U3 (Chestnutdriver/boost) ,some caps round U3 and Nicely cleaned it in ultrasonebath .

Everething works fine exept one thing , the backscreensaver( picture) and the markings red numbers ( incoming sms) next to the icons are schaking/vibrating randomly .

Also , very strange , when selecting backcamera the uper icons( HDR, flash,etc) are shown written (mirror)backwords.

Anyone any idea where to look?

Greetings