Toshiba windows 10 for parts

Selling this computer, it's been around for a few years. Its only problem is that it was unused for a while and when I turned it on again, these letters appeared as shown in the photo, and I haven't taken it to a technician to check this issue!! It only shows this abnormality; you can come take a look with no obligation!! It comes with the case and charger!! Everything as described I personally deliver to anyone located in the center of Viseu.