Yes, it is better to specify the usual things : the model, firmware region, Android version and bootloader. Perhaps someone has already had such a problem, and can give a link to the topic. If you want, I can post your question on 4pda, but it needs to be formulated correctly.
Alternatively, you can wait for Deelite to clearly translate your problem. Unfortunately, I know English at a very low level.
Если там oled дисплей, то он скорее всего начал выгорать. На 4пда пишут о схожих проблемах