turbo or bearing ???

My Peugeot 206 HDI (63,000 kms. And 5 years) has a noise in the right front, similar to the one that makes a turbine and has a hard time starting cold. I think it can be due to the turbo, although in the workshop they have told me that it is due to the alternator bearing or something. Could you tell me what it can be due and how much can repair cost me? or if I can buy the replacement or whatever I have broken in a scrapping ???? Thank you so much

Hello friend, to have an idea of ​​the noise removes the accessoris strap that the alternator commands and starts, if the noise disappears then it can be the alternator, tell us how you are doing, greetings.