There have been many posts concerning this issue in the Microsoft Community forum; your help is greatly appreciated.
The computer I'm assisting a client with is a Gateway SX2865 desktop that came preloaded with Windows 8 OEM. They had a TV hooked up to it via HDMI with no issues. The client upgraded from 8 to 8.1 last month, to which they lost HDMI output and has existed with the Windows 10 upgrade applied last week.
I've tried many fixes, including completely removing the display driver (any software, driver files, registry entries), reverting to using the old Windows 7 driver provided by Gateway's support site, and using the latest graphics driver for Windows 10 (including the version acquired by Windows Update).
None of these fixes provided a working solution.
The HDMI port doesn't seem to detect the TV display, as when it is connected, powered on, and selected to the correct HDMI input, the computer does not show an additional display. The only display shown in Device Manager and Display Properties is the Acer monitor connected via VGA.
This computer does NOT utilize discreet or dedicated graphics. It only uses the integrated graphics provided by the processor (Intel HD graphics).
There are no driver issues within Device Manager, all are up to date and reporting to work correctly. The chipset, HDMI audio, Intel MEI, and other devices were updated using 3DP Chip.
When using the Windows key + P combination using any graphics driver (the base driver, the Win7 x64 driver, the Win10 driver updated through WinUpdate) shows no display output modes. An error message says cannot project to a second display, there may be an issue with your current graphics adapter or driver software.
I have also had the client disconnect the Acer monitor via VGA and leave the TV connected via HDMI as the primary display. The computer still does not detect this display even as primary/single, as the TV shows no signal detected, and the device manager shows no inputs detected for monitor (I was remotely connected to the client's computer thus could still see everything "on-screen")
Anyone have any luck with Windows 10 and HDMI output with integrated Intel HD graphics (specifically from a Celeron or Pentium dual core processor?)
The chipset is Intel Express H61.
Any input / assistance is greatly appreciated in advance.