I just bought Rokia N8 mobile phone the day before yesterday, and the incoming message and music play silently.

First reset the ringtone and message sound, then turn the volume of the ringtone to the maximum and the volume of the player to the maximum. If there is still no sound, the external speaker may be poorly connected or disconnected. You can try it with headphones. If so, the connection is broken or the speaker is broken. Assuming there is no sound in the earphone, it may be that the power amplifier circuit is burnt out and can only be sent for repair. You can eliminate it step by step according to this method!