Input problem with LG tv (1 Viewer)

I've got an LG LCD TV, either 42CS570 or 47CS570 (both listed on the manual, and I can't get around to the back of the set to clarify one digit), with three HDMI ports.

I got the Amazon Fire TV the other day, and that's been working great, but something happened last night, and now the HDMI port that it's plugged into won't show as active on the input list.

HDMI 1 is my Verizon FiOS box. HDMI 2 is the Amazon box, and HDMI 3 is the blu-ray player.

Naturally, HDMI 1 is always showing as active. HDMI 3 is only active when the blu-ray player is on. HDMI 2 should be active all of the time, because there's no power button on the Amazon Fire box or remote. The only way I know to reset it is to pop the power cord out -- which I have done, but that doesn't have any effect on the input menu.

When this problem first came up, the Amazon box was still in the HDMI 3 port. I had disconnected the blu-ray player to use the HDMI cable for a project downstairs, so there was nothing plugged into HDMI 2. I thought maybe it was having problems with non-consecutive ports. I have since reconnected the blu-ray into HDMI 3, and moved Amazon to HDMI 2. It still won't recognize the Amazon box as an active input, but it will light up HDMI 3 if the blu-ray player is on.

I can still move over to the grayed out HDMI 2 icon and select it with the tv remote. But, the FiOS remote only cycles through the active input ports.

Just to illustrate, my input menu screen looks something like this: http://assets.hardwarezone.com/img/2011/11/input.jpg
(I don't think it's the exact same model, but close enough.) In that picture, the "network" and HDMI2 are active ports, which means I would be able to cycle through those with the Verizon remote, but I would need the TV remote to get to the other ten inputs.

Anyone have any ideas on how to get HDMI 2 to light back up to active?

Overall, not a huge issue...but I try to minimize the use of the TV remote, since most of the "TV" function is through the FiOS box anyway. That, and we keep putting the TV remote up so our two year old can't get to it, and often misplace it.

My guess is you hot swapped HDMI and DRM/HDCP is spoiling the party.Unplug the TV, give it 15 minutes. Turn the TV on 2nd after plugging the AF back into the wall.

And Sam would probably agree that receivers make better hubs than TVs, no?

Tried the unplugging...also reset to factory defaults twice. Still having the issue.

Not sure what to tell you. But once you screw up handshake...

Have you tried the Amazon box on another TV? Maybe something happened to the HDMI jack and it quit working...stranger things have happened. Have you tried a different cable, I've had cables go bad as well. But it sounds like maybe the HDMI port died.

The port works, it just doesn't show up in the active input list. I can watch Amazon Fire TV.

Regardless of whichever port it's plugged into, it doesn't show as active. When the problem started, Amazon was HDMI 3, and the blu-ray player was HDMI 2. So, HDMI 2 was showing as active, but HDMI 3 was grayed out. I swapped the devices, so now HDMI 3 with blu-ray shows as active, but HDMI 2 with Amazon is grayed out.