No sound through headphones

Can anyone suggest a solution to my problem please? I get no sound at all through headphones during Zoom meetings, on a Lenovo T490 laptop with Windows 10. Video audio is good, and music too, and the laptop speakers work ok. My headphones are cheap JVC ones with a lead which I plug into the audio socket on the laptop (there’s no microphone socket, so no chance of me putting it in the wrong one by mistake). Today I uninstalled and reinstalled Zoom Workspace, so it must be the latest version. I have looked through all the Audio settings, nothing seems to be incorrect (and the microphone is enabled by default). 

I would like to buy some new Bluetooth headphones, but I am frightened that after spending money I will still have the same problem.