I tried powering off HDMI devices and unplugging the cables from the TV. Then, while the TV was on, I unplugged it. After it sat for about 20 minutes, I plugged the HDMI cables into the ports again, and turned the power on to all the devices. The TV signal came through faintly--with washed out colors--but wasn't sustained.
In an effort to get an Apple TV working on HDMI port #3, and following the bad advice of someone online, I entered the Service Menu and disabled the HDMI Hot Plug. When that didn't help with the Apple TV, I went back through the steps and enabled that setting.
Trouble is, nothing connected by HDMI works anymore--not the blu-ray player, nor the DirectTV Genie. The Wii, connected by component cables still works, and the TV's standard menu pops up when cued.
I've done a factory reset, but it didn't help.
Any advice anybody can give....PLEASE?!