Hello. I just only noticed that my speaker doesnt work (headphones work). Have Mi2 for 10-11 months, didnt have any problems. He didnt fall much (few time, but had protective case all the time...). Is there a way to check it by myself if there is a slight wire/something contact failor ? Cause i cant send it to China (bought it there, not from some site).? Much appreciated any tips and help.