A headphone jack on a smartphone may stop working due to several reasons, including dust or debris blocking the port, a loose or damaged connector inside the jack, software glitches that fail to detect external audio devices, outdated or incompatible audio drivers, or issues What Could be the Reason for The Headphone jack not Working on a Smartphone?
caused by recent system updates. In some cases, the headphones themselves may be faulty, or the phone’s settings could be set to output audio through Bluetooth or speakers instead of the wired connection.
I have encountered the issue of no audio output from headphones on several occasions. In most cases, I have discovered that a wire or wires connecting at the plug have become damaged.
This issue can be resolved by either completely removing and replacing the plug or by cutting through the plug to resolder the wires. However, I would like to emphasize that a break anywhere along the wire would result in the same problem. Therefore, it is important to inspect the entire length of the wire for any signs of damage. Additionally, one must consider the connection of the headphone wire. At times, the wire may be pulled, leading to a disconnection.
I recommend performing a quick troubleshooting of the headphones by testing them on a different device to confirm that the issue lies with the headphones and not the device itself. Occasionally, the device may be the source of the problem, with causes ranging from simple lint trapped in the jack to more significant obstructions. Furthermore, a loose jack fitting can also result in a lack of audio.