How can I fix my screen

Hi @lesegomolete

The screen is faulty and needs to be replaced as it cannot be repaired.

Here's a video that may help.

Note: There are two Galaxy A12 models and they use different screens. If you get the wrong screen it won't work.

The Samsung part number for a Galaxy A12 (SM-A125F) LCD + digitizer module is GH96-14116A and the part number for a Galaxy A12 Nacho also known as a Galaxy A12s (SM-A127F) LCD + digitizer module is GH82-26486A GH82-26485A (for the BOE flex version) or GH82-26925A (for the LTPS flex version).

Check what model number that your phone is and then search online for the part number applicable to your model.