Troubleshooting HD to SD Switching Issue
Hi everyone. I have a persistent issue where my picture drops whenever I switch from watching an HD channel to a SD channel or vice versa.
Here's my setup today:
Xfinity RNG200N HD Dual Tuner DVR connected via HDMI to
Pioneer VSX 920 Receiver connected via HDMI to
Samsung LN46C630K1F LCD HDTV
There's a Xbox One and Wii connected via HDMI and Component Video respectively, but no issues with those inputs. No audio cables involved, using HDMI for audio across the board.
Here's what happens. If I'm watching a HD cable channel and I switch to a SD channel 8 times out of 10 the SD picture will never come in and it will be replaced with a harsh grey static screen. The audio comes in fine. The TV does not display the "no signal" error. I can almost always resolve the problem by switching the input on the receiver to another input for a few second and then switching back to the cable input and the SD channel will come in fine.
When I switch from watching a SD channel to an HD channel the problem is a little different. 3 times out of 10 the HD channel's picture will come in heavily pixelated. Again the sound works fine. This problem is also resolved by switching from one input to another and back.
Anyone help me troubleshoot this? I don't know if this is an issue with the Pioneer receiver, maybe one of the HDMI inputs or firmware is outdated? Maybe something about the upscaler in the receiver is bad or failing? Could it be a compatibility issue with the Pioneer receiver and the Samsung TV? Could an HDMI cable be bad? Could there be an HDMI version matching problem? Is this just a crappy Xfinity box? I'm stumped.
I've reconnected the system a few times and have swapped out HDMI cables so I don't think it's a damaged or defective cable. Though some of the cables are from the same batch so it doesn't rule out some weird compatibility issue.
My next step is eliminating the receiver from the equation and seeing if I can reproduce the issue. I'm betting the issue will go away, but I'm not ready to just scrap the receiver and HDMI cables at that point so any extra trouble shooting steps would be welcome.