MegaPixel Display N4000A Question

[nickzinn]

I have a MegaPixel Display N4000A (manufactured 1991), that I have lightly used since I picked it up in 1999 (loading dock of Moore building at UPenn).   I recently started getting back into the NeXT scene and it has developed this white fringing outside of the display image.  This was only after a recent weekend of using the computer.  Oddly adjusting the brightness changes the white fringe but doesn't actually remove it, even when brightness is all the way down.  It doesn't seem like burn in, because it is outside of the display area.  Is this a sign of the dreaded NeXT monitor death or is there something I can do fix it?

Thanks in advance!