When I connect the Dell Inspiron N7110 with a HDMI cable to a Sony TV, screen shows but sound is played via the computer only. This is since Windows 10, with Windows 7 + 8 it had some quirks (we always had to switch off sound enhancements first to get it working, but it worked).
This is what I checked/tried:
Device manager: uninstalled both drivers at Audio -input and output, and also System Devices/High Definition Audio Controller, all is reinstalled after a reset
Display adapters: there are 2. Intel (R) HD Graphics 3000 and NVIDIA GeForce GT 525M. Removed the Intel driver, which is reinstalled after a reset.
Also tried to switch off each; switching off the Intel does not change anything; switching off the NVidia stops displaying the picture on the TV as well.
It does not matter if the display is on the TV only or stretched on laptop + TV (2 screens). I can however not duplicate the screen - this does not show anything on TV when chosen.
One remarkable thing:
On starting the NVidia installation program, it DOES show correctly HDMI: SONY TV XV . You can then press a button from there which opens the Windows Sound configuration screen where it only shows the icon of the internal speakers (yes right mouse option Show Disabled devices and Show Disconnected devices are both checked).
The problem can not be the HDMI cable. I've connected several other brands of laptops and they all work. Basically, as soon as I connect the HDMI cable, the SONY TV icon appears as a sound device. With the Dell, it does not.
I've checked
en.community.dell.com/.../19543436 but that basically doesn't bring me further.
I suspect the presence of 2 graphic cards is the problem somehow although a HP I tried does also have both and there it works. I am currently out of options. What more can I do to get this working?