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 numbers one is using. There seems to be a correlation with Sony TVs and Dolby Vision use. Thanks!

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. ❤️

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

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

That seems to have done the trick. Thank you!

Roku Ultra has intermittent green flashes

RokuCarly
Community Moderator
2 years ago
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
- CRusso
  Streaming Star
  2 years ago
  
  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
  - RokuJohnB
    Community Moderator
    2 years ago
    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
edroksense
Roku Guru
2 years ago
If there is no pixilation when viewing video, and occurs when viewing tv, then it is local signal interference.
Other to consider is electrical rating is low to sustain its power requirement.
RokuCarly
Community Moderator
2 years ago
Thanks for the added information, CRusso!

At this moment, this is still in the process of investigation and we acknowledge the update. We'll forward these additional details to our team as this will help us find you the best resolution possible.

Once we've been notified of updates from the team, we will make sure to let you know.

Best regards,
Carly
- CRusso
  Streaming Star
  2 years ago
  Hello. I think I've been very patient with this issue but feel I've been sent to Support Limbo.
  I've had the Roku Ultra since January 2024 and it worked properly for two months. I have demonstrated within this thread that frequent flashing occurs only on some streaming networks but not others, on a Sony TV that is only a few years old. This is with the original HDMI cable as well as an equivalent hi-def one. I also provided the technical info you requested.
  It's maddening to watch a movie or show with constant flashes as I wait for another response. Can't I just swap out this unit for a new one? Everything, including the packaging and remote, are in perfect condition.
  Rather than wait, please permit me a replacement model!
  Thank you,
  Carl Russo
  - Rk10
    Channel Surfer
    2 years ago
    identical issues here - it happens on You tube as well. I don’t think it is all specific
    i also agree it started about 6-8 months ago - it used to work perfectly
    I suspect a software update along the way created the issue ?

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