@KC
Hi,
HDMI no signal error usually occurs due to faulty HDMI cable or un-supported type of HDMI cable or speed of the data transmission of the cable to the screen is not good enough for display.
Before diving into complex troubleshooting steps, first check your hardware. Make sure that the HDMI cable is inserted correctly and all the connections are fully functional.
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If you can’t see your TV on the screen, follow steps below:
On your keyboard, press the Windows logo key and P at the same time.
Click Duplicate.
If Duplicate doesn’t work, try switching to Extend.
After that, check to see if Windows can detect your TV.
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Hope above information can help you.
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