Samsung S9 Screen Problems
Introduction
Owners of the Samsung Galaxy S9 and S9+ have reported facing an issue with their screens, where it displays a green tint and flickers. The issue has perplexed many and has led some users on a quest to find a permanent solution.
The Problem
The green screen issue isn’t a new one, and many have experienced it. One user reported that colors on their S9+ appeared a bit faded and slightly green. Although it wasn’t alarmingly severe initially, a sudden transformation to a full green screen with horizontal lines appeared out of nowhere.
Several users initially believed this was due to a software update since the timing correlated. However, many observed the screen turning yellowish even during the Galaxy S9+ boot screen, pointing away from a software cause.
Temporary solutions like clearing the cache, force restarting, or adjusting the universal always-on display settings provided fleeting relief. These workarounds were not consistent and often resulted in additional problems, such as drastically reduced battery life.
The Underlying Cause
After much investigation, a video [Link provided in the forum post] was found suggesting the flex cable, which connects the display, could be the root of the problem. Replacement of this cable would solve the issue and is more economical than replacing the entire display.
However, a significant breakthrough came when a user found moisture inside their phone, even without any direct water exposure. This discovery led to the hypothesis that moisture trapped inside might be affecting the flex cable ICs, leading to the green screen problem.
A DIY Solution
The user then attempted a DIY solution by directing the exhaust fan of their gaming laptop towards the phone, blowing hot air inside it for about three hours. Following this, they heated the bottom half area of the phone, specifically where the flex cable ICs are located, using a hairdryer. This process aimed to remove the moisture accumulated inside.
The result was astounding. The phone returned to its original display quality with no green tint, flickering, or the need for any ‘Always On Display’ tricks.
Feedback and Precautions
Some users who tried this method also confirmed its effectiveness, although a technician advised caution. Exposure to moisture can lead to corrosion unless cleaned correctly. The best way to address this issue would be to open the phone, clean it, dry it, and then reseal it with an official Samsung adhesive rework kit.
Another user shared a workaround for the green screen, involving Bixby settings and brightness adjustments. Although this didn’t solve the underlying issue, it did provide temporary relief.
Lastly, a word of caution for users thinking of heating their devices: be wary of the temperatures applied, especially near the USB-C port, as excessive heat can cause damage or crack the screen.
Conclusion
While the moisture removal technique provides hope to many, it’s crucial to remember that it might not work for all. If the issue persists, professional help or a cable replacement might be necessary. Always prioritize safety and avoid any DIY methods that may seem risky.
Stay informed, stay safe, and always keep a backup of your data.