Hi again @A9035s, no need to apologize, nothing wrong with your English. 
If you have performed a software repair using Xperia Companion and you are still experiencing this behavior with your device I recommend that you get in contact with your Local support team for assistance with how to have your device sent in to an authorized service center for repair.
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@Alias_1974wrote:Sir I also tried the software repair but still it's showing the same problem. What to do now
Sounds strange, coz repair with Xperia Companion fixing problems like this one. If you not rooted yours smartphone and software is official got from Xperia Companion, is not modified, must fix this issues Xperia Companion, if still problem persist after repair i recommend you bring smartphone to authorized service in yours location, coz service have tools with which will check where is problem. But my opinion sounds yours problem like that is software problems. Coz i have the same model and even after update to Android 6.0 i don't have any problems with camera, from 2016 everything working fine (i don't root my smartphone and software is from Xperia Companion, so it's legal and official), so i guess you rooted yours smartphone or you installed 3rd parties software from maybe developers XDA website and ect. But as i siad i just guess
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