How do I check fuses on Sony STR-D865 Receiver?

Where are the fuses on a Sony STR-D865 receiver and how do I check them? Basically I'm having an issue where the front speakers no longer work (but the surround speakers do). There's also no longer any display on the screen for it and I already tried testing other speakers but they don't work either. I was told to check the fuses but how?