I SEE THE PVI COLOR BARS / LOGO BUT NOT MY VIDEO SOURCE

Television sets can receive from the Coaxial Cable VIA THEIR DIGITAL TUNER

The TV digital tuner is set by FCC / EBU to receive NTSC / PAL signals ( 59.94 frames per second / 50 frames per second )

Please test your unit using a regular dvd player / bluray player / xbox / playstation / ipad / tv set top box and verify it works

Then connect back your " non working " source and set it the same as your other sources so it will work

US TV STANDARD = 59.94 Frames Per Second  480i / 480p / 720p / 1080i  / 1080p

PAL TV STANDARD = 50 Frames Per Second  576i / 576p / 720p / 1080i  / 1080p

If your unit does not support these HDMI resolution, you can simply use a COMPONENT > TO > HDMI audio/video mini converter from amazon
This will create a TV-STANDARD HDMI with perfect quality and compatible with your TV sets to be receiveable