I was able to repair my top screen by myself by following the instructions posted by Ghiata_Loredan on this other post: Denon X1850 Bottom Screen Display Dead After 2 Months, New Mixer - #4 by Ghiata_Loredan
Costed $69 for the screen at instrumentalparts.com, and had to wait about a month before I finally received it. Installing it was pretty easy too.