Hi everybody, this is my first post here although I've been reading these forums for years

I've read many of you are having issues trying to get HDMI Pass Through to work. Well...I'll do my best to help you solve those issues since I've got mine working beautifully, this is my setup:
TV: Panasonic G20 42"
Console: XBOX360
DVD/BR: Panasonic BDT-110
AMP: Pioneer VSX-921 (1021K in USA)
All components connected with HDMI 1.4 cables to the AMP.
I can pass through the video and audio of my XBOX and my DVD/BR player perfectly.
HDMI Pass Through...WTF!!
In the manual, (pages 41 to 43), everything related to HDMI Control, ARC and HDMI Pass Through is explained but, I must confess, in a non very friendly way.
In short here's what you should do to get it working:
1. Make all connections between your components and the amp (HDMI connections).
2. Enable HDMI Control (or however each brand names it i.e. "Viera Link" in Panasonic products) on every component that needs to "pass through" the AMP.
3. Enable HDMI Control in the AMP (Control mode -> ALL)
4. Turn off or put in standby every component but the AMP. Then switch the AMP's power off and disconnect the AMP's power cord from the wall socket. Wait 10 seconds before proceeding to step 5.
5. Connect the AMP's power cord to the wall socket and turn on the AMP. After this receiver is connected to an AC outlet, a 2 second to 10 second HDMI initialization process begins. You cannot carry out any operations during this process. The HDMI indicator in the front panel display blinks during this process, and you can turn on this receiver once it has stopped blinking.
That's it...now you can test if HDMI Pass Through works and I can tell you it does.
Take into account that if you change (add, remove, change) HDMI connections after this process...you'll have to repeat it since changing connections will break the synchronization and HDMI Pass Through will stop working.
This information is all contained and well written in the manual, these are the text snippets:
Quote:
When connecting this system or changing connections, be sure to switch the power off and disconnect the power cord from the wall socket. After completing all connections, connect the power cords to the wall socket.
After this receiver is connected to an AC outlet, a 2 second to 10 second HDMI initialization process begins. You cannot carry out any operations during this process. The HDMI indicator in the front panel display blinks during this process, and you can turn on this receiver once it has stopped blinking.
Quote:
Before using synchronization
Once you have finished all connections and settings, you must:
1. Put all components into standby mode.
2. Turn the power on for all components, with the power for the TV being turned on last.
3. Choose the HDMI input to which the TV is connected to this receiver, and see if video output from connected components displays properly on the screen or not.
4. Check whether the components connected to all HDMI inputs are properly displayed.
This AMP is GREAT, in fact
it has recently been awarded as the best 2011-2012 AV receiver by the EISA, it only needs some love

Hope this helps anyone!!