Tapping the button launches a grid overlay with an "X" tracking pattern stretching across the corners of your screen.
For those comfortable diving deeper, Samsung devices accept hundreds of service codes. Here are additional useful ones:
If the diagnostic tests confirmed a hardware failure (dead zones, severe line discoloration, or complete touch failure), explore these repair paths: samsung galaxy diagnostics screen tool fixer
While third-party "fixer" apps often contain malware, Samsung’s official diagnostic tool is safe, zero-cost, and incredibly accurate. It tests:
You will see a grid of over 20 diagnostic categories, including dedicated tests for the screen. Utilizing Screen Diagnostic Tools to Identify Failures Tapping the button launches a grid overlay with
Minor drops can slightly dislodge the screen digitizer flex cable from the logic board, resulting in partial touch responsiveness. A certified technician can open the rear glass panel to securely re-seat this connector.
The is arguably the most underutilized feature on millions of devices. By memorizing the *#0*# code and understanding the touch recalibration process, you can solve 70% of common touchscreen grievances without leaving your couch. It tests: You will see a grid of
Use this to "paint" the screen to find unresponsive areas.