Roku Ultra has intermittent green flashes
Has anyone ever gotten this issue solved by Roku support? The last post on this is two years old.
I don't see any fixes for this problem on this forum, just questions from Roku on model/serial numb...
Forum Discussion
A warm welcome here in the Roku Community, CRusso!
Our sincerest apologies for any inconvenience this may have caused you. No worries! We're here to be of assistance in finding the best resolution to the display issues you've been experiencing.
As of now, we do not have any further updates regarding the collection of device information needed for the report.
Furthermore, in order to provide you with a precise and effective resolution, we require further information from you regarding this matter. With this being said, kindly let us know the following:
- Can you please confirm on which channel have you seen the green/purple flashes?
- When did you start seeing this happening and what troubleshooting steps have you tried to try and resolve this?
- Would you be able to provide us with a photo for reference?
We'll be anticipating your response as we are more than eager to help you resolve this.
Best regards,
Carly
Thanks for your quick response!
The quick green flash happens on Max and maybe Hulu. I cannot anticipate when it will occur so it's practically impossible to photograph. I can describe it, though. A horizontal band flashes across the bottom 10% of the screen. That band is made up of squares in kind of a checkerboard pattern.
This does not happen when using the TV's built-in browser.
It started when I swapped out the HDMI cable supplied by Roku with a supposed high-end cable a few months ago. The flashing started at that time so I put the original Roku cable back in place, which resolved the issue until last week.
I've not tried any other troubleshooting yet but look forward to your recommendations.
Thank you,
Carl
Hi CRusso,
Thank you for keeping us posted here in the Roku Community!
We would be delighted to help you further with this problem you are experiencing. Please try the steps below.
- Press Home on your Roku remote.
- Scroll and select Settings.
- Select System.
- Select Power. If you do not see a Power submenu, skip to the next step.
- Select System Restart.
If the problem still persists, please keep us posted.
Best regards, John
Well, the reset worked for a few weeks but now the green flashes are back, at least on Hulu and Max. A new reset does nothing. (This is not a Dolby Vision-only problem.)
Okay, okay, I might be able to shed some light on the green flashes....
This happened to me when I switched TVs. It seemed to happen almost like clockwork with temperature change, as the TV warmed up. It would start doing the green flashes about 20 minutes after I turned the TV on, and it would flash for about half an hour (give or take several minutes), enough that I couldn't keep watching as is. Then it would sometimes stop on its own, altho I usually felt compelled to fidget with it.
I'm always analyzing, and I concluded that it behaved like a short in the HDMI 1 input. If I jiggled the cable, and made sure it was pushed in all the way, the green flashes would stop, eventually. But, I usually had to sit and wait to make sure it stopped. Often it would start again and I would have to push it more to the left or more right, while pushing it in, to find the sweet spot. Eventually it would stop.
Thing is, it was never "cured". Messing with the cable always worked, but it would happen again the next day 20-30 minutes after I turned it on--I concluded it was expansion of the metal in the connectors somewhere. I still had picture (somewhat), so it was still connected, but some part was "not quite" there, flashing green on and off. HOWEVER, if I never turned the TV off, the flashing would stop for months at a time!!
The person who had the TV prior was sort of like a bull in a china shop, and I think she yanked on cables indiscriminately, and probably shoved them in forcibly, etc., causing a short. And since the other TV never did it, I don't think it was the cable. I think it was a short in the plug of the TV itself. Hopefully the warranty is still good because I think you got a lemon. Personally, I would report the TV defective and get a replacement. It's a real pain, I know! I feel for you, because when you sit down to watch TV, it's usually end of the day when you want to relax. The green flashes not only ruin that, but the frustration of having to get up and down, up and down, trying to resolve a problem that your not sure what the cause of is... You have my sympathy.
The flasher TV of mine is no longer in the picture. Flashes and frustration are both gone! I hope you find a solution too. ❤️
I spoke too soon. The green flashing has not been eliminated by a software update, resetting the power, or unplugging the box. Now it's worse as I try to watch Max.
As I wrote earlier in the thread, I cannot anticipate when it will occur so it's practically impossible to photograph. A horizontal band flashes across the bottom 10% of the screen in less than a second. That band is made up of squares in kind of a checkerboard pattern.
But additionally, I'm now getting a full-screen flash of thin, green horizontal stripes.
Please advise. Thank you.
Hi CRusso,
We appreciate your quick response.
We will work with you to know what went wrong so we can assist you further and fix the issue. Can you try streaming other channels aside from Max and Hulu to see if the issue persists on other channels? Also, is it possible to take a video of the screen so you can take a screenshot of it when it occurs? This way, we can have a photo as a reference in case we'll need to forward it to the appropriate Roku team to investigate further.
As a last resort, you can try factory resetting your Roku device if that's okay with you. Please note that this will erase your personal preferences, unlink your device from your Roku account, reset all settings, and return your device to a state ready for initial setup.
We look forward to hearing from you and looking closely into this issue. Thank you!
Kind regards,
Eunice
That seems to have done the trick. Thank you!
