Did you ever experience that the automatic brightness failure of the iPhone screen? Even when you set the screen to the brightest, the screen is still dim. If you are facing these problems, how to solve them? Firstly, you don’t need to be in a hurry to repair it first. Rather you can solve it first through this article. Thus, you can immediately identified the dim screen brightness caused by software or hardware!
This article is applicable with the device model below:
- iPhone 4, 4s
- iPhone 5, 5s
- iPhone 6, 6Plus, 6s, 6s Plus
- iPhone 7, 7 Plus
- iPhone 8, 8 Plus
- iPhone XR
- iPhone X
- iPhone XS, XS Max
1. Restart Device and Reset Device
There is a possibilities that the problem is due to the iOS update. The iOS update sometime will bring some bugs to the device. User is suggested to restart iPhone first. After that, check again whether the problem still persist or not. If that does not help, try to reset iPhone after back up.
2. Overheating Issue Cause Dim iPhone Screen
When users watch videos or play heavy performance games such as Genshin Impact, the high speed CPU will cause temperature increment to the iPhone. Therefore, the screen brightness might reduce and adjusting brightness is useless. This is because the iPhone Detection Mechanism is active to prevent device temperature over certain range. Thus, this mechanism prevent the aging of battery and other electronics. So when your iPhone temperature starting to rise, put it in cool room or under air conditional.
3. Turn Off Settings
If you find that the screen is always very dark with maximum brightness, you can set it through the following method
Go to “Settings”> “General”> “Auxiliary Use”> “Monitor Adjustment”, turn off “Auto brightness” and “Reduce white point”, and turn off the “Invert color” and “Color filter” functions.
4. Turn On iPhone Screen Auto Brightness Settings
Moreover, if it is because the screen cannot automatically adjust the brightness, you can try to turn on the “Automatic brightness adjustment” function and turn off the other functions.
Location: “Settings”> “General”> “Subsidy Use”> “Monitor Adjustment”
5. Battery Aging or Overheating
If the iPhone is hot, it will also affect the screen brightness. For example, the iPhone battery has been used for a long time, and the battery has not been replaced for more than two years. It is recommended to check the battery health through the following methods first, such as below 80 % Below, the battery should be replaced to prevent the screen from showing low brightness due to the aging of the battery
6. Ambient Light Detector Malfunction
Generally, iPhone can automatically adjust the screen brightness. However, it is actually achieved through optical sensing components. For example, if the room is too dark, it will automatically adjust the screen brightness to the lowest level. If it is outdoors, it will automatically adjust the screen to the brightest.
If there is no way to adjust the screen brightness, there are usually the following reasons
- Full screen protector blocks the ambient light detector. Check whether there is a hole for the ambient light detector
- Panel is dirty or stuck with dust. Clean it carefully with moist tissue
Finally, if the above condition did not solve your problems, the ambient light detector is probably malfunction.
7. LCD or iPhone Screen Backlit Module Aging
Furthermore, non-bangs iPhone models use backlit modules. As it ages, it will definitely cause the backlit worsen. Even if the screen is adjusted to the brightest, it is still so dark. In this case, the screen backlight module is aging. You can prepare to change the iPhone screen to solve it.
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