Issue With iPhone Screen When JCID Programmer Writes True Tone

When using the JC True Tone Adapter, we may encounter screen display problems. The screen turns black or green when writing True Tone data. For this problem, our article below will introduce it.

Common causes and solutions

1. Socket wear causes poor contact: The socket connecting the display and the motherboard will wear over time, causing poor contact and display problems.
Solution: Make sure the socket is clean and free of debris. If worn, it may need to be replaced to restore normal contact and function.
2. Fuse resistor (F1, F2, F3) failure on the adapter: High current may cause the F1, F2 and F3 fuse resistors on the adapter to fail, resulting in screen burn-in or black/green screen.
Solution: Check these resistors for damage. If they are faulty, replacing them may solve the problem.
3. Software settings: Problems with True Tone and Night Shift settings may cause the screen to have a green tint.
Solution: Turn off True Tone and Night Shift settings in Settings > Display & Brightness.
4. Hardware defect: Excessive green light from the display itself may indicate a hardware defect.
Solution: This may require a recall or replacement of the device.

Troubleshooting steps:

Check True Tone settings: Make sure True Tone is enabled in Settings > Display & Brightness.
Restart your iPhone: Press and hold the side button until the power off slider appears. Drag the slider to turn off the device. Wait 30 seconds, then press and hold the side button again until the Apple logo appears.
Software update: Make sure your iPhone is running the latest iOS version. Go to Settings > General > Software Update and install any available updates.
Check for hardware issues: Make sure nothing is blocking the ambient light sensor and clean the screen to remove smudges or fingerprints.
iPhone Screen replacement issues: If you recently replaced your screen, ensure the new screen supports True Tone and is properly programmed. Use a multi-functional programmer to transfer data from the original screen to the new one.
Reset all settings: Go to Settings > General > Reset > Reset All Settings. This will reset all settings but will not delete your data.

True Tone Adapter Short Circuit Guide

1. 12-13 Original Screen True Tone Adapter V1.1, Short Circuit F1 and F2
2. 12-13 Screen True Tone Adapter V1.3, Short Circuit F1 and F2
3. 12-14 True Tone Repair Adapter V1.0, Short Circuit F1, F2 and F3 4. 12-14 True Tone Repair Adapter V1.1, Short Circuit F1, F2 and F3
5. 12-14 True Tone Repair Adapter V1.2, Short Circuit F1 and F2
6. 12-15 True Tone Repair Adapter V1.3, Short Circuit F1 and F2 7. 13-14Pro True Tone Repair Adapter V1.0, Short Circuit F1
8. 13-14Pro True Tone Repair Adapter V1.1, Short Circuit F1
9. 13-15Pro True Tone Repair Adapter V1.2, Short Circuit F1 The above is the method to solve the problem of the screen turning black or green when writing JCID True Tone. If the problem still exists after the above operation, please contact a professional mobile phone repair person for consultation or obtain professional mobile phone repair tools from Phonefix to press the display and touch screen together for repair and replace the display driver IC on the FPC.