Fixed Headphone Jack via Restore
I'd just completed a System Backup for my year old Q10. After completion, I tried listening to YouTube videos via the headphone jack. No sound, only through main speakers. The earphones had been working all day.
In a couple instances, the jack could be pulled most-the-way out, hearing some static, and then being able to hear via ear phones. But the jack would fall out at that point.
Based on web suggestions, I shut off the Q10, then stuck a straightened paper clip to the bottom of the port. Lol' and behold, a millimeter diameter pile of lint fell out -- just like one YouTuber showed! But earphones still did not work. Tried alcohol on a round toothpick (with sharp point broken off) with a small length of alcohol prep wipe to clean the port. Still no earphones.
Tried Restore to the System Backup just completed. Still no earphone.
Solution: Restore to the prior month's System Backup, ignoring media files. Voila! This worked. :laughing::rotfl::dancing: I try to run a System Backup monthly, and keep the last 3-4 on my hard drive. Its grown to 2 GB thus far, with music and media files stored on my new 64 GB SD chip.
Loss: a few free apps I tried the last 30 days, and my re-organized icons on Home screens.
Didn't get a chance to try one claimed trick to hold the "answer" button on the earbud wire for 3 seconds while playing sound through the speakers. Maybe next time.