Galaxy Diagnostics Screen Tool Fixer [Must Try]

You will see a grid of squares. Drag your finger across all of them; if they turn blue, your digitizer is healthy. Any white spots indicate a dead zone.

For a deeper, "bare-metal" look at your screen's health without the overhead of an app, you can use secret diagnostic codes. How to use Samsung Members Diagnostics galaxy diagnostics screen tool fixer

Open the app (download it from the Galaxy Store if you don't have it). Tap the Support tab at the bottom right. Select Phone Diagnostics . Key Screen Tests: You will see a grid of squares