Nikon DSLR LCD black ring

Hi,
I have a bit old nikon dslr D5000, it take good pictures without any issue. The only problem is last few years it's lcd developed a black/dark ring around the display, looks like the led inside lcd are getting dim. I have attached picture below. Is this fixable by cleaning or some how or do i have to replace the entire lcd.


Best regards.

Have seen the same in an old Casio calculator and one of my DMM. The same happened to one of my camera maybe 2 to 4 years ago which became unusable.