Definitely replace that fuse clip, and I'd recommend replacing all of them at the same time, since the original DE clips are notoriously shitty, but I doubt that's the source of your GI issues (your GI fuses are #'s 1 through 4 on the PPB board.)

If I had to guess, you've got burnt GI headers/connectors on the power board and/or PPB.

Check header CN8 on your power board and header J5 on the PPB. Your GI comes from CN8 (on the power board) to J5 (on the PPB), where it runs through those 4 fuses on the PPB, then it goes out to the playfield, backbox and coin door. On DE's those connectors commonly burned up - if you see that on yours, replace those header pins on the boards and re-pin the connectors on those cable ends.