so basically i got an s4 and the charging dock stopped working and would only charge after a long period of time by going on and off every few seconds. now the battery is fried so i got an external charger and a new battery. i also changed the charging dock part and it worked for 1 full charge then stopped working again along with the microphone :O! so now ive gave it another shot and bought the same part off another company and i seem to have no audio through the loud speaker, the microphone works again and its still not charging.

Anyone know what i should try next?