To fix Insignia TV slow internet connection, you will first need to check the current resolution for the input source. Unfortunately, not all Insignia TVs are designed for high resolution, and playing videos at the highest resolution can clog your internet connection. By reducing the resolution a bit, you can help speed up the internet connection.
You can reset the Insignia TV by unplugging the TV from its power source for 60 seconds. This will refresh the memory cache and allow you to create new settings and preferences. Performing a factory reset will delete previously saved settings, returning the TV to its original default settings.
If Roku on your Insignia TV is showing a black, blank, or dark screen with no picture, you may be able to fix the issue with a power cycle. To power cycle your TV, unplug the TV from the power source and allow it to sit for a few minutes before plugging it back in and testing Roku once more.
Reset the Insignia TV by unplugging it at the wall. Wait for 1 minute and then plug it back in. Power the Insignia TV back on. Verify whether the issue is resolved. Otherwise check the cables and the inputs. Finally, if it is still flashing contact Insignia customer support.