Try the headset in another device. If it works fine in that, then the 3.5mm port(s) may be the issue. If, however, it doesn't work in the other device, then your headset may be damaged.
Also try connecting a different headset/headphones/speaker to the 3.5mm port and see if they work.
If it does work in the other device, you might want to try getting a 3.5mm to USB adapter and connect through a USB port.