Seeing a black line on mobile screen can be alarming, but it's a common issue that often points to either hardware damage or software-related glitches. These lines may appear vertically or horizontally and can disrupt your viewing experience. In many cases, a simple restart or software update may resolve the issue, especially if it's caused by a temporary bug. If the problem continues, trying a factory reset might help, but make sure to back up your data first. However, if the black line remains after these steps, the issue is likely hardware-related—such as a damaged screen or faulty display connector. This can happen due to accidental drops, pressure on the screen, or internal component failure. In such cases, it's best to seek help from a certified technician. Addressing a black line on mobile screen promptly can prevent the issue from worsening and restore your device's functionality.
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Early frame cracks and dead pixels could mean bigger quality problems. It's important to check dead pixels (https://whitescreentest.net/) and fix these issues soon to avoid safety risks or worse damage.