Hello Giorgio;
Here is the link for the user manual for the '''Epson EB-675W''' projector,; https://www.manualslib.com/manual/1267576/Epson-Powerlite-675w.html#manual
I cannot determine actual fix for this issue given the amount of info you gave, perhaps you can more closely determine the fix using this manual, or even call their tech support if needed!
Good Luck!
Rich Lilja