Original topic:

Green Line Issue: Is it an update problem? What's the real reason? πŸ˜΅β€πŸ’«

(Topic created on: 09-21-2023 07:32 AM)
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Sha_zan
Expert Level 2
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Tech Expert

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First and foremost, this issue primarily occurs due to overheating.

When a phone gets too hot, the heat is spread either in the display or the metal panel behind it, causing direct damage to the screen. 

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During this process, the adhesive tape, known asAnisotropic Conductive Film (ACF), used to connect the display and flex, may become loose or shrink, leading to disconnection from the pin connected to the matrix. As a result, the display starts showinggreen,pink, or white lines.

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To solve this issue, a machine called the "Flex bonding machine" can be used. However, it can be costly and might not be readily available in our region. This machine uses punch soldering technology. 

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There's also a more advanced machine with laser technology that can effectively and efficiently resolve all line issues, better than punch solder technology, which requires removing and separating the entire component. 

Unfortunately, most companies usually suggest getting a 'replacement' as the main solution. But when your warranty ends or your phone gets older, like around 3 to 4 years, the cost of getting a new one is really high, and it's hard to find spare parts, making replacement not a practical option.

In such cases, the only option is to voice your issue, whether through Twitter posts or by seeking assistance from influencers. 

Some brands may even offer free replacements, but they often come with strict conditions, such as detecting even minor physical damage like scratches on the display, which could result in service denial.

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Another prominent issue gaining attention recently is users encountering the green line after updating their phones. It's essential to clarify that this issue doesn't comes from the update itself. 

Brands carefully check all updates before release. The myth surrounding this issue relates to the two receivers in the display's flex, through which data is calibrated from the System-on-Chip (SoC) to the display. Brands do not deliberately cause this problem to force users into buying new smartphones.


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Now, let's get back to our discussion. While gaming and rendering are indeed demanding tasks for smartphones, tasks like copying, compressing, or extracting files also require significant processing power. 

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Take a YouTube video, for instance; it is stored on YouTube servers, which function similarly to file-sharing sites. Although it may seem that a smartphone can easily manage this task, it cannot, as servers are equipped with high-core, power-consuming CPUs designed for such intensive operations.

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Returning to the update scenario, when you update your phone, the update is downloaded and stored in RAM as a compressed file, subsequently flashed through as a decompressed file simultaneously. 

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This places a substantial demand on the Mobile System-on-Chip (SoC) processor, RAM, and flash memory. All three components generate heat, leading to heat dispersion through the display. This, in turn, results in the adhesive tape loosening, causing the issue, either immediately or over time.

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Now, another problem arises due to overheating, leading to unresponsiveness or malfunctions in the phone. It's worth noting that the green line problem occurs most frequently in AMOLED displays. High-end mobile SoC processors are constructed using a method called POP (Package over Package) humorously described as 'the sandwich way' πŸ₯ͺ, with RAM soldered above the SoC. 

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During high-intensity tasks, heat affects both the SoC and RAM, potentially causing the soldered connection's between the RAM and SoC or the SoC and the motherboard to melt. When this happens, your phone becomes unusable. 

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Surprisingly, there's a method called IC Reball that can fix this issue. But it's tough because sometimes, when you try it, the phone can get damaged and stop working. And even if it works, the phone might become slower afterward, with success rates between 20% and 50%.

By explaining this, I hope you understand what's really causing this smartphone problem for people everywhere. It's the smartphone companies' responsibility to fix it, and I hope more people will voice their concerns about it now.

2 Comments
mhdzumair
Active Level 1
Tech Expert
Sounds like a reasonable and Informative article. πŸ‘
Sha_zan
Expert Level 2
Tech Expert
Thanks...πŸ‘