Pinetime Screen issue after bootloop troubles

[Spater]

Thanks @wibble for looking into the assembly of the heart rate sensor and case fitting.

I believe @Spater had a sealed unit, so this may indicate some manufacturing check that needs to be performed during assembly.

@barray you are right, I have the Sealed version of Pinetime.

How did you clean the green corrosion? Ideally you try some non-conductive anti-corrosion cleaner (maybe pure alcohol?).

I used pure Isopropyl alcohol to clean it.

It still may not explain the display though.

Took a look at the back of screen, could the spot in the red circle (see attached picture) be due to some kind of overheating?