Display green line issue again plaguing Samsung Galaxy S21 phones 

Users of Samsung Galaxy S21 FE and S21 Ultra reporting the display green line issue following the software update. A few months back, many complaints surfaced on the web, citing the same problem due to the latest software installation only.

Now it looks like the display green line issue again haunting users of the Samsung Galaxy S21 series. A thin vertical green line appears on the screen without any external damage from the insertion of foreign material.

The green line issue is a hardware defect, which couldn’t be generated by software only. The problem occurs when because of a faulty display connector or flex cable. Internal elements could be damaged because of phone overheating due to software installation in Exynos phones.

In the past, we’ve seen many cases of the green line on display problem in Samsung phones. The company has also offered free screen replacement to select models, hence, there’s no other way to address it. Software glitches can be addressed by hard reset, but hardware defects can’t.

Since the connector and flex cable link the display to the phone’s main circuit board, the green or purple line could appear if any one of those components gets faulty. Apart from damage, looseness could also lead to display-related problems, including green vertical lines.

The problem appeared mostly on Exynos-powered Galaxy devices. The reason could be the overheating, which further extends while the phone installs a new firmware update. In the worst case, the surrounding atmosphere could also lead to damage to display-related components.

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