I finally got around last night to blowing apart the empeg and testing the fuses. It is definitely a fuse. Spcifically, it is the one pointed to by the arrow in the picture in Bitt's post. I know I can get one of these from Digi-Key for less than 79¢, but they want $5.00 handling for orders under $25.00. Is there a better place to get these?

BTW, I have a couple of other players that I don't use as much as this one. (Total of three in service) One is a MkII and one is a MkIIa, the one with the bad fuse is a MkIIa. If I were to put the drive tray and display board on one of the other empegs, could I use either the MkII or the MkIIa? I guess what I am asking is the level of hardware/software interchangeability between MkII and MkIIa models