I'm uncertain of the specific TV you have but I have a 22in Vizio Razor I purchased for use in the RV. Also grabbed a Vizio BluRay player to go with it. Never could get the HDMI ports between the two devices to work properly and returned the player for another (same model, same issues) took the player back, set the TV up as a computer monitor on VGA and ran occasional use from a Direct TV receiver via HDMI with no issues.
I say this as in my limited experience the Vizio design and QC might not be quite everything it could be. I've LOTS of DirectTV receivers HDMI connected to many brands of TV (Sharp,Sony,Toshiba,Samsung,Vizio, Some brand X) and never had issues.
Does your Vizio have some form of HDMI control function that is turned ON by default? If so make sure that is OFF.
Don "I hate it when my things become smoking holes" Bolton
I just bought a new Vizio TV in December and in July of this year all the HDMI ports on the TV went out. Called Vizio and they came and replaced the motherboard on the TV. Only 1 week after the fix, the first HDMI port went again, now today, the second one went...Called Vizio again and that's when I was told that it might be the Cable Box (Direct TV HD-DVR receiver). Vizio will come out and fix the TV again - but I am reluctant to use the HDMI ports...called Direct TV, but since only 2 HDMI ports went out, they will not send me out a new box...but from what I am reading here, they would just send me out the same model HR24-200....so their fix is to send me out component cables to use instead.
It seems that in a year, Direct TV has not fixed their receiver problems...or it is just affecting Vizio TVs?