Hi @Oleg1243, let me see if I can help out here.
Your post has been translated to English as this is an International forum, please post any replies in English and it will be easier for me and other users to assist you.
Have you been able to carry out a quick test of the flashlight in the support app in order to see if the hardware works as intended? To do this, find and tap Settings > Support > Xperia Tests > Torch/flashlight. Also, how exactly are you trying to activate the flashlight and do you receive any kind of error message when it fails?
Please return with this information and I will do my best to assist you!
