Solving playback issues

[SDN8V73]

My Roku 4802R worked great until the other day. Audio cuts out like a bad signal on a cell phone. It’s on every channel and even the clicks you hear when scrolling the menus also cut out. The screen also flashes/glitches about every 30-45 seconds. 
I have switched HDMI PORTS
Switched HDMI cables.                                     Reset my modem/router.                             Unplugged Roku.                                          Unplugged the TV.                                             Internet connection speed is great              Software is up to date                  Everything WAS working fine.         Nothing changed on my end. 
I only have the problem when using Roku. 

[RokuEmmanuel-D · Accepted solution]

Welcome to the Roku Community, @SDN8V73.

Thank you for letting us know about the issue with your Roku. We understand how frustrating it must be to experience sound glitches and flashing and crashing displays. We are here to help and will work to resolve this issue as quickly as possible.

In the meantime, if you haven't done rebooting your Roku through the Settings, try the following steps below to reboot your Roku device: 

1. Press Home  on your Roku remote
2. Scroll and select Settings
3. Select System
4. Select Power. If you do not see a Power submenu, skip to the next step.
5. Select System restart

Please keep us posted so we can closely examine the issue you're running into.

All the best,
Emman