Answer to: which piece is this one?This part comes from home button and touch buttons location. Your tablet will work without it. You can see it in this Picture: https://d3nevzfk7ii3be.cloudfront.net/ig... Left side under plastic housing close to button connector. :)
Answer to: Bluetooth won't turn onHi, It seems to be a Wifi and Bluetooth chip problem. It can be changed or reballed.
Answer to: repair cost of my tablet?Hi, For Tab S 10.5 Glass only repair costs 100 Eur. It takes atleast 3 hours of work + 20 Eur materials. Best regards