If the screen works perfectly in Safe Mode, delete recently downloaded apps, launchers, or screen-dimming overlay apps.
button. A large 'X' made of small white squares filled the screen. "Go ahead. Draw a line through every square. If they turn green, the digitizer—the part that reads your touch—is alive".
The screen should turn bright green and vibrate, indicating the sensor detects your hand. samsung galaxy diagnostics screen tool fixer
Samsung Galaxy smartphones feature a hidden, powerful hardware diagnostic menu built directly into the One UI ecosystem. This internal system allows users to test the screen, digitizer, vibration motors, cameras, and sensor arrays without downloading third-party applications. If you are experiencing dead pixels, touch unresponsiveness, ghost touches, or color bleeding, this built-in diagnostic framework serves as your primary troubleshooting tool and screen "fixer." How to Access the Secret Samsung Diagnostics Menu
Samsung Galaxy Diagnostics Screen Tool Fixer: A Comprehensive Guide to Troubleshooting Your Device If the screen works perfectly in Safe Mode,
, these screens allow you to pinpoint issues with the display, sensors, and battery. How to Access Diagnostic Tools
If the first code does not work, your carrier may have disabled it. Try this alternative: Open the app. Type *#7353# . Select the specific test from the list. Method 3: Samsung Members App "Go ahead
If the secret code does not work, use settings.Samsung hides a second tool inside Device Care. Open your app. Scroll down to Device Care . Tap on Diagnostics . Choose Phone diagnostics . Key Tests to Fix Screen Issues