A 4-PRO is certainly worth repairing.
Folks who know what they are doing i those amps don't have as much trouble with the assembly. It just depends on the person... some see them regularly, some not.
Specifically here, those fuses seem to be the ones in the low voltage power supply, and the repair should be cheap and pretty easy, assuming the problem doesn't go any further.
Clearly worth taking in, but please take it to someone who has a clue..... we don't know where you are, but there are apparently a bunch of people who can't, or don't want to, repair SS amps except by board replacement.