Brand new Inspiron 15 7000 running Windows 10.
Start up Windows with the headphones already plugged into the audio jack, and sound is correctly played through the headphones. Unplug the headphone from the jack, and sound comes through the built-in speakers. But now plug the headphones back in, and sound continues from the built-in speakers (and not the headphones).
If you startup Windows with the headphones unplugged, sound is never played through the headphones.
According to this article on Dell Support, the "solution" is to re-install the drivers. I tried this but this did not resolve the issue (headphones only work if Windows is booted with them plugged in).
In the registry the following are set:
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] "WavesSvc"="\"C:\\Windows\\System32\\DriverStore\\FileRepository\\wavesapo9de.inf_amd64_f0ed9cf2b4f48fab\\WavesSvc64.exe\" -Jack" "RtkAudUService"="\"C:\\Windows\\System32\\RtkAudUService64.exe\" -background"
Could this be a hardware problem? Is there anything to check in the BIOS?
Have completed uninstalled and then re-installed Realtek audio drivers but without resolving the problem (headphones only work if they were plugged in when the PC is booted).