The diagnostics check your battery status to tell you if the battery is "Weak" or "Normal." If it's weak, you know it's time for a battery replacement.
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If your diagnostics indicate a problem and the included suggestions don't resolve it, contact your local Samsung Service Center or visit a certified repair professional.
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
Use diagnostics when you notice:
To safely close the hidden menu, simply tap the on your screen or navigation bar. If you are stuck in a specific test (like the Touch test), you must complete the test successfully, or hold down the physical power button to restart the device. Summary Checklist for Troubleshooting Component Issue Diagnostic Button Common Fix Screen Ghosting / Burn-in RED / GREEN / BLUE Run solid color for 10 minutes to reduce ghosting. Unresponsive Screen TOUCH Remove thick glass screen protectors; recalibrate. Silent / Muffled Audio SPEAKER / RECEIVER Clean speaker grilles with a brush while the tone plays. Inaccurate Map Directions SENSOR
: Covers over 24 different components, including battery health, NFC, and Wi-Fi. How to Check Display on Samsung Phones Using Secret Codes The diagnostics check your battery status to tell
This sounds like a very useful concept for a utility app or a hidden service menu enhancement. Since "Samsung Galaxy Diagnostics Screen Tool Fixer" doesn't currently exist as a mainstream, standalone app, I have outlined exactly what this feature would do, how it would work, and how you can achieve similar results with existing tools.
Go to Settings > Accessibility > Visibility enhancements and temporarily toggle Color inversion to balance out uneven pixel degradation. Fixing Green Screen or Flickering Lines
For many tests, you will need to interact with the screen. For example, the touchscreen test requires you to draw over the entire grid. If you are stuck in a specific test
The term "Samsung Galaxy Diagnostics Screen Tool Fixer" refers to a suite of proprietary, firmware-level utilities pre-installed on every Samsung Galaxy device. It is not a single button you download from the Play Store, but rather a hidden service menu and a dedicated app called
The solid white screen is the best way to check for display discoloration, yellow tinting, or uneven backlighting.
AMOLED burn-in (ghost images of keyboard or TikTok icons) is permanent, but the diagnostics tool can help even out the wear.