Samsung Galaxy Diagnostics Screen Tool Fixer [2021] Jun 2026

Open the app (pre-installed, or available via the Galaxy Store). Tap the Support tab at the bottom right of the screen. Select Phone Diagnostics .

In the "Support" or "Get Help" section of the app, you have two diagnostic options: you can tap individual icons to test specific components, or select the "Test all" or "Run diagnostics" button for a complete system scan. The app will then guide you through a series of on-screen instructions for each test.

By utilizing Samsung’s built-in diagnostic tools, you take control of your device maintenance. This utility separates simple software bugs from genuine hardware failures, saving you time and money on unnecessary repair center visits.

Every Samsung Galaxy user has experienced that gut-wrenching moment: a frozen screen, unresponsive touch zones, random reboots, or the dreaded "System UI isn't responding" error. Before you rush to a repair shop or—worse—trade in your device, there is a powerful, hidden arsenal within your phone. It’s called the . samsung galaxy diagnostics screen tool fixer

If specific boxes refuse to turn green despite heavy pressure, you have identified a physical dead zone in the digitizer. If you are using a thick tempered glass screen protector, removing it and re-running this test will instantly tell you if the protector or the actual screen is at fault. 3. Screen Dimming and Refresh Rate Stability ( DIMMING )

This turns off the pixels entirely on OLED/AMOLED displays. If you see light bleeding through or notice an uneven gray glow in a dark room, your display panel is experiencing structural degradation or screen burn-in. The Touch Test Matrix

The first three buttons at the top of the menu display absolute, solid blocks of primary colors across 100% of your screen. Open the app (pre-installed, or available via the

Samsung's official Self Repair Assistant app is available in the Galaxy Store and provides step-by-step repair guides.

Tests the OLED panel’s ability to turn off pixels completely for true blacks.

A diagnostic tool is not a magic wand. It cannot fix a broken screen. If you have performed the hardware tests and confirmed a physical issue, you have two official routes from Samsung for repair. In the "Support" or "Get Help" section of

The Samsung Galaxy diagnostics screen tool is a native, hidden hardware diagnostic menu embedded in the firmware of most Samsung devices. Often referred to by tech enthusiasts as the "Secret Diagnostic Menu" or "Hardware Test Mode," this utility bypasses the standard Android user interface to interact directly with the phone's hardware abstraction layer.

You can choose to Test all components or select specific items, such as "Touch screen," "Screen," or "Battery status."

Most users never see this screen because it’s tucked behind a "magic" code. When you open your phone dialer and type , the standard interface vanishes, replaced by a grid of clinical white buttons.