I'd hold off on the factory resets for now. Maybe later, but those should always be a last resort.
You changed HDMI cables. Did you change HDMI ports?
And what do you mean "start the device?"
Which Roku device do you have? Model number and OS version/build may be helpful. Settings > System > About
DBDukes
Roku Community Streaming Expert
Note: I am not a Roku employee.
If this post solves your problem please help others find this answer and click "Accept as Solution."
I did not change HDMI ports. the device details are as following,
Model #3941X-Roku Express 4K
OS: 11.0.0.build 4193-CR
@vel2022, if that device has the "power saving" option under Settings->System->Power try disabling it.
When you get that error, does it clear if you change your tv to a different input (tuner, different HDMI port) and back?