I used to have this problem. Screen just decided to go dark and be back up. I resolved it by replacing HDMI cables, both from TV to AVR and from AVR to Stream box with the ones that are HDMI Certified. You can try that to see if it work.

 

I'd recommend going into the Roku Settings -> Display Type -> and try the various 4k options or even Auto Detect. It's possible the Roku is sending video in a format the Onkyo can't handle.

Additionally, try the 'sub' HDMI out as well as the 'Main' HDMI out.

How long is your HDMI cable? I had issues on my TX-NR686 using Roku as source and a relatively long HDMI cable connected to a BenQ EP5920 1080p projector. A new cable did the trick.

Unfortunately Onkyo receivers have a long history of HDMI ********. I had an RC360 and then the replacement RC460 blow their HDMI boards. So far my NR686 has been ok but I'll most likely just get a Denon next time.

 

I'd recommend going into the Roku Settings -> Display Type -> and try the various 4k options or even Auto Detect. It's possible the Roku is sending video in a format the Onkyo can't handle.

Additionally, try the 'sub' HDMI out as well as the 'Main' HDMI out.

How long is your HDMI cable? I had issues on my TX-NR686 using Roku as source and a relatively long HDMI cable connected to a BenQ EP5920 1080p projector. A new cable did the trick.

Unfortunately Onkyo receivers have a long history of HDMI ****. I had an RC360 and then the replacement RC460 blow their HDMI boards. So far my NR686 has been ok but I'll most likely just get a Denon next time.

Thank you. I removed all the cables and tried one more time and it seems to work OK now. I've HDMI cable that's 50ft long connected to Epson 2250. Replacing the cable would be an expensive option as the wires are run thru the ceilings before finishing the basement.

 

I own a Onkyo TX-NR696 receiver and for some reason take up to a minute to change devices if watching cable box want to switch to DVD if the machine still on take up to a minute if not I need to shut down the Receiver and re start it so the change of the device happen. I contacted Onkyo never answer back, I call them on the phone, the Customer Rep new very little made me re set the machine but didn't work. I had the same problem with my Pioneer receiver so I bought the Onkyo then I found out are the same product different brand but same company same product so I have the same issue i tried factory reset, a tried different settings I tried buying a full new set of HDMI cables high speed when I change the cables it work perfect for 10 minutes i have plug a Bluray Machine, A cable Box, an Apple TV, a Mac Mini Computer, and a DVD-R also I have a VHS and Laser Disc but those go via DVD-R differnet imputs. all the devices are conected to the receiver via HDMI and the conection with the 55" Sharp TV is also HDMI If anyone have any idea why this happen and know how to fix it or can guide me Thanks so much

 

Hi.
I have a problem with my Onkyo TX-NR696 receiver. From today, the receiver stay in "Headphone" mode. I don't have a Jack headphone pluged in the receiver. I reset te Receiver with Factory Settings and I make the last Bios upgrade. (the problem has started before the reset and before the upgrade. The problem didn't come from thoses actions).
Now, with the "Headphone mode" (the Icon Headphone is visible on the main screen), I didn't have any sound on my Speakers :-(. Could someone give me an advice ? Thanks.