OK, here is my issue. I bought my Pioneer VSX-1120-k in January of 2011. Everything worked great and I love(d) it. Several months ago the HDMI port on the front of the unit stopped working with the HDMI out from my PC. I also tried running the cable to a different port on the back with the same results. If I plug the HDMI cable directly into my TV (Panasonic TC58S1) it works fine so I believe I can rule out issues with my cable and with my output from my PC. This wasn't a huge deal as I rarely stream from my PC so I ignored it.
A couple of days ago the picture went blank on my TV (input from SAT box) for several minutes but then spontaneously came back on. Then, the next morning, when I fired up the Dish Network box, TV and receiver the audio started but the screen was blank. After rebooting the SAT box and unplugging the receiver and TV and restarting everything, voila - everything worked. Same thing the next morning but it wouldn't show video after the reboots but spontaneously came on 30 minutes later. Now, the video drops out for long periods of time frequently throughout the day.
Tonight (with no video on TV) I unplugged the HDMI cable from the SAT box to the receiver and plugged it directly into the TV and the picture was perfect. I believe I have ruled out a cable issue, a SAT box issue and a TV issue and have narrowed it down to my Pioneer receiver. I guess it could be the cable coming from the HDMI out on the receiver and running into the TV but it seems unlikely as it hasn't been manipulated at all.
So, would it be worth doing a hard reset on the receiver? How about doing the firmware upgrade? I will be in touch with Pioneer as it is still under warranty but know they will have me take it to an authorized dealer for repair and I am hoping to avoid that. Any help would be appreciated.