This message was posted on behalf of Intel Corporation
I understand that when yo connect your TV to your computer you get a “No Signal” message on the TV screen.
Let me apologize for any inconvenience this issue may be causing to you.
In order to help you better I would like to gather more information about the configuration you have in the computer. Please reply to this email attaching the .txt file the Intel® System Support Utility will generate https://downloadcenter.intel.com/download/25293/Intel-System-Support-Utility
What type of video cable are you using between the computer and the TV?
The problem is resolved. The PC was set up to show desktop on external monitor only; and I had switched the TV to the wrong input connector. So I could not see the desktaop anywhere.
The external-only setting was unexpected since I had been running this PC with a different external monitor in extend mode.
It would help if the Intel display control panel would allow you to see such and edit such defaults, or in general "profiles" for monitors that are not currently connected. That would have saved me some grief in this case, since I would have been able to see that the PC screen was going to be disabled.