Welcome to the board!
Give us a little more information to go with your problem: Why do you think it's the fuse holder?
Looks (from a schematic) that there are 4 fuses. Most likely they are in holders mounted on the power supply board, although the one in the main A.C. line may be by itself near where the line cord enters the case.
Reason says: "There are questions that can't be answered."
Religion says: "There are answers that can't be questioned."