Because the R-7 uses LCOS display panels, it is not especially susceptible to display burn-in. However, if a bright static image is displayed for hours, it can leave a visible ghost image that is visible depending on what is shown on the display later.
Attached please find a App that shows a white screen and keeps the display on. If you see burn-in on the R-7 LCOS display, we suggest that you install this App, change the display brightness to manual 10%, have the charging cable connected and then run this app overnight. The display should be working normally again afterword.