Sound not playing on HDMI device from XPS 27 Windows 10
A Sony TV connected as external device via the HDMI port stop playing sound. The Sound (Playback Device) showed the device and was setup to be the default. The bars even showed sound playing but no actual sound. The enhancements were disabled.
After struggling I decided to update the VIDEO driver. The XPS27 has an NVIDIA card for the monitor and and INTEL card for external devices. I wend to Device Manager / Display Adapters / Intel(R) HD Graphics 4600 and under Drivers I clicked Update Driver.
After downloading and installing, the screens went blank and had to power cycle the PC but finally it appeared and worked again.
This is the log from Events on the diver. Some lines from Nov when it stop working and some lines from December after the driver update