Have you tried unplugging the TV for several minutes?
yes tried and left it unplugged all night
That doesn't look good. Have you tried contacting onn? I think it's a hardware problem and not the Roku software.
Where can I get support for my Roku TV™? | Official Roku Support
After the new update it went back to normal
We’re upgrading Roku Community to bring you a faster, more mobile-friendly experience. You may notice limited functionality or read-only access during this time. Read more here.
Planned Downtime:
Community will be unavailable for up to 24–48 hours during the upgrade window during the week of May 19th and you may notice reduced functionality.
In the meantime, for additional assistance, visit our Support Site.
We're sorry for this disruption — we’re excited to share what’s next!