Centro has no sound after using headphones

Question

Hi, all.  I used a 2.5 mm jack (radio shack adapter) so I could used my good quality headphones and listen to mp3 music.  After removing this, my Centro had no volume when making calls and people on other end couldn't hear me either.  The common fix for this (wiggling a pin inside the 2.5 mm female jack of the phone) did correct this.  But I won't do this every time I want to listen to mp 3. 
So, why did this happen?  Is there a specific type of 2.5 mm jack, or is this a phone defect (ie:  a pin inside the female end of the jack sticking)?  Is this a common issue?  Is there a permanent fix?
Post relates to: Centro (AT&T)

Answer 1

This issue has been reported on Treo model phones. It sounds like the microswitch in the headset jack is sticking.
What you have done is similar to the procedure supplied in the kb.palm.com article regarding the headset jack issue.
Here are the steps for trying to resolve the issue.
Plug and unplug: Try plugging and unplugging the headset to the smartphone a couple of times. The smartphone might mistakenly be under the impression that a headset is plugged into the phone, which would make it route audio to a nonexistent headset.
Clean the jack: If there is contamination or debris stuck in the audio jack, the speaker, microphone or headset may not work properly. Visually inspect the jack for debris that could block the connection. Try inserting and removing the handsfree headset a couple of times to see if it clears the debris from the device. You can blow into the jack or use gentle compressed air to clear debris. Note: Be cautious in using foreign objects to clear the jack. Like your ear canal, the headset jack is a delicate space that can be damaged if you clean it improperly. 
Where's the trouble? If the steps above didn't help, you may need to contact Palm for further troubleshooting. An agent can walk you through a process to determine whether a particular component is failing, and whether the device needs repair.
I would suggest using a non-conductive electrical contact cleaner (you can find this in the electrical dept. at Home depot or hardware stores),  spray it on plug of your headphones, insert and remove the plug several times to try and clean the jack.
For reference purposes, click on the following link for the support page for your device on the kb.palm.com webpage.
http://kb.palm.com/wps/portal/kb/na/centro/centro/att/home/page_en.html
There are links on the page to the user guide, troubleshooting, how to's, downloads, etc.