Hello. I'm not sure if this is software or hardware problem: phone boots into OS as usual, but after few minutes max screen brightness drops to somewhere around 30%, no matter other settings, moving brightness slider from 0 to 30% brightness changes as usual, but after 30% brightness stop increasing, it is very dim and unusable for me. Any ideas how to fix/debug this ? Also, even at 30% brightness and doing literally nothing second quarter of the phone from top getting unusually hot.
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