Why won't the sound on my iPhone work? No music, no text tones or ring tone.

Question

This morning my phones sound did not work when I plugged it into my car to play music. I unplugged it and realized none of the sound was working. No ringtone, no voicemail, no phonecalls, nothing. After playing with it and restarting it a couple times, it would turn on after static noises but then turn back off after a few seconds. At night I charge it on my iPod speakers, could that have caused the problem?

Answer 1

Last Gasp from another thread
This will fix it:
1. Open iCal and backup your entries. Make a note of the fie name and location, you're going to need them in a minute. Once your backup/export is completed, close the iCal application.
2. Open Finder and remove everything inside the "Username/Library/Calendars" folder. For instance, if your username is "Joe", then move everything inside the "Joe/Library/Calendars" folder.
3. Open the iSync application. It's located in the "/Applications/" folder. Once iSync is opened, go into the iSync Preferences (iSync -> Preferences) and push/click the "Reset Sync History" button. Then, close the iSync application.
4. select the file your created earlier. Dbl click on it.
5. Open the iTunes application and connect your Apple iPhone to the computer.
6. Within the Advanced section of the Info tab for the Apple iPhone, check the box the overwrites/replaces the Calendar data on the Apple iPhone.
7. Click the Apple/Sync button. New, modified and deleted entries should now be syncing correctly.