Suunto vertical titanium screen black circle

[PoonsupT]

Re: Vertical screen burn-in?
I used Suunto vertical titanium for running& swimming in September 2023. After 2 months, I see black circle around the screen. I went to service center in Thailand , changed the new one. Then I used them until August 2024, the black circle happens again. I swim everyday in swimming pool 2hrs/day. I press start /stop button beneath the water .I take a shower after swimming with my watch. Is it water leakage or defect ?

[sartoric]

@PoonsupT
Any picture ?
The solar panel is a “circle” around the screen

[PoonsupT]

@sartoric
It is not solar circle . It is black shadow on the white screen.

[halajos]

@PoonsupT just guessing, were the watches exposed to extreme heat, like in the sauna?

[PoonsupT]

@halajos
I ‘ ve never used my watch exposed to the heat such as charging solar exposed to direct sunlight. I used Ambit 3 peak for 7 years , never has this problem. Service center in Thailand told me that ambit 3 peak is one component (only one seal encapsulation) . While vertical is 3 components ( 3 seals).
I ‘m not sure water may be leaked from heart rate sensor component.

[Brad_Olwin]

@PoonsupT That may be a backlight issue, I think nothing to do with solar or heat. You might try adjusting the backlight or turning it on and see what happens. I do not see a shadow on my screen as you show.

[halajos]

@Brad_Olwin if the artifact is visible in bright sunlight, it might be related to polarization, which MIP displays rely on.

[PoonsupT]

Today,I test my new changed watch 29 Aug 2024. There is no different between high vs. low vs no back light.
Base on my experience, the black circle appears 2 months, getting darker after 6 months. I will check again after using 2months.
Thank for all suggestion.