Home screen enlarged when powering on

I have been using a Roku Express 4K+ for 6 months now.  Up until a month ago it worked perfectly.  Then I started having problems most of the time when turning it on.  It will power on but the screen will be enlarged and blurry. It's enlarged to the point of only being able to see a part of the first row of apps. I'll hit the Hulu button on the remote (as that what I use most of the time), Hulu will appear also greatly enlarged, then I'll select enter to get something to display which is also greatly enlarged.  I'll power off then on again and it will be on the Hulu show that I selected and will be perfectly displayed.  I have tried the reset on the device,  unplugging the device, and looked in settings and haven't found anything that has helped.  Any suggestions for a fix would be greatly appreciated.