HDMI Compatibility I am utilizing the Pioneer VSX-81TXV Receiver to switch audio/video through to a Sharp 46" LCD Display. I am utilizing a Toshiba D-6000 Upconverting DVD Player on HDMI input 1. When viewing the source on the HDMI input of the Sharp the image cycles on and off at the LCD and the audio mode on the front of the Pioneer cycles between DD and Stereo simultaneously with the TV cycle. It seems to me that there is a compatibility issue between the Pioneer and the DVD player. If I send the signal from the DVD directly to the LCD Panel around the Pioneer I have no problem. The problem only presents itself when using the Pioneer to switch the HDMI 1/2 inputs through to the LCD.

check speaker button on front of unit. May be switched to off..

You guys mentioned the reset via the front panel, and I tried that with this very same issue on my VSX-822-k and it worked!
thought I would post the instructions for anyone else that lands here:
Reset the main unit if the receiver is generally not operating correctly. Switch the receiver into standby mode. Hold down the "BAND" button while pressing the "STANDYBY/ON" button for about two seconds. When "Reset?" appears in the display window, press the "AUTO SURROUND/ STREAM DIRECT" button. "OK?" appears in the display window. Press "STEREO/A.L.C." to confirm. "OK" appears in the window. The system has been reset.

Make sure you are using version 1.3a HDMI cables. That should sort out your problems.Make sure both the cables are v1.3 type

Hissing? How loud? A sub isn't even capable of making high frequency sounds at normal volumes.

The Pioneer manual would tell you how to enable and test the subwoofer output.
Page 17 and the MACCV procedures on Page 33 (auto) or 43 (manual)

Your receiver has 2 HDMI in with one HDMI out, 3 Component in and one out, and two difital optical in. If the bluray player has HDMI out this woukd be your best bet because HDMI carries the audio and video. If it has Component out, you would have to provde sound through the digital optical. Not knowing what blueray player or kind of tv you have, it's hard to advise so I may be over explaining. Anyway, we've touched on the bluray player to receiver. Out of your three HDMI slots on your receiver only one is HDMI out so make sure you're in the right one. Idaelly you have a DVD/blueray in on your receiver so on your receiver you would select "DVD" when playing. If your hook up is correct you may have to try another HDMI cable to test.

To correct this problem you have to go to the display settings on your xbox and turn off display detect.

Check if your KuroLink is on or off. There are a lot of problems that users have been having with the KuroLink on. Since you have a Pioneer display, KuroLink might help in switching both the receiver and the display on and off together, but my advice to you would be play around with the settings (in your case, especially KuroLink). Also remember, the KuroLink is on by default i.e. if you've never changed this setting, it probably is on.
Hope this solution works, else check out the Official Thread on Pioneer VSX 1019 AH-K on avsforum. There are a lot of helpful people out there.

The DVI output usually transmits only video (I'm almost 90% sure about this). It would be better if you did not use the DVI to HDMI cable. Receivers and displays can be very picky when it comes to using HDMI. Your Motorola DSR505 has other output options on its rear. I would suggest using the Component out for video (the 3 outputs colored green, blue and red) and either an optical or coaxial for the audio. The Pioneer VSX 1019 AH-K has the required inputs. Of course, you would require new component and coaxial/optical cables to do the job.
Hope this helps. If you're still in a tangle, you can consult the Official Thread on the Pioneer VSX 1019 AH-K on avsforum. There are a lot of helpful people out there.

This pioneer does not support HDMI, so for the best resolution you have to use video the component inputs and output, those are marked as Y (green), Pr (red) and Pb (Blue) and remember, this signals are only for video so you need to hook up the audio too.

The receiver is not locking on the digital audio on the HDMI. Try a different cable or sat box if you use one. Use a digital audio cable instead of the HDMI to the reveiver. HDMI is full of issues.