Galaxy Watch 4 hit by vertical line display bug on aging AMOLED panel

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Credit: Andy Walker / Android Authority

TL;DR

A Reddit user reported a vertical white line on their Galaxy Watch 4 following a recent software update, showing that the notorious smartphone display issue is appearing on smartwatches.

While there are only a few reported cases over the years, the hardware breakdown suggests aging wearable AMOLED panels share the same thermal and electrical stress vulnerabilities as phones.

Since the 2021 smartwatch is well past its warranty period, an expensive screen replacement is the only definitive fix, making a brand-new upgrade the wiser investment.

The green line issue on AMOLED smartphones has unfortunately become very common over the past few years, often scaring users into avoiding software updates altogether. It seems the issue has now jumped device categories, as we’re now seeing another report of a white line on a Galaxy Watch 4.

Reddit user HKNworld alleges that their Galaxy Watch 4 now has a vertical white line after the One UI 8 Watch update.