Hi Dave, it sounds like your laptop isn’t detecting the headphone jack. What you can do, first, Check Device Manager, Make sure the audio driver is installed and up to date.
Right-click the sound icon then Open Sound settings then Check if the headphone jack appears under Output devices.
Also, try plugging in the headphones first, then restart the laptop.
Then Run the Windows Troubleshooter under Settings then System then Sound.
If none of these work, it might be a hardware issue or a driver conflict.
Also, when you plug in the headphones, do you hear a “connected” sound or see any notification that a new device was detected?
Let me know how it goes.
Chard