Thanks for joining the graphics community.
I see you are trying to connect your computer to your TV via HDMI port.
At this point, make sure TV settings are selected properly to pick HDMI connection, select HDMI as TV out source.
If possible try testing another HDMI monitor, this will ensure HDMI port on the computer is working properly.
Try straight cables, this time make sure you are using HDMI to HDMI cable, not an adapter.
Check computer BIOS to see if there is an option for HDMI enable/disable.
The following URL's provides some tips about HDMI issues: