Indexed by what you notice, not by what the subsystem is called — because when something is wrong you know there's no sound, not that it's a routing problem.
5 of the 7 problems below are not faults. They are documented behaviour that looks like one, and they are marked working as designed.
Change it to FRONT in the I/O menu. It is a setting, not a physical switch, and this catches nearly every new owner.
Fractal Audio: Axe-Fx II product and support pagesEvery block has two variants, X and Y, not four channels. Channels arrived with the current generation.
Fractal Audio: Axe-Fx II product and support pagesCygnus is current-generation only. There is no upgrade path, and presets do not cross between generations.
Fractal Audio: Axe-Fx II product and support pagesXL, XL+ and Mark II use EtherCON with FASLINK. The original Axe-Fx II has a plain Ethernet port. Check which you have before buying cables.
Fractal Audio: Axe-Fx II product and support pagesUse a Humbuster cable from the quarter-inch output — TRS at the Axe-Fx, TS at the amp.
Fractal Audio: Axe-Fx II product and support pagesEight scenes per preset, and turning Quick Control knob A on the recall screen changes them without a foot controller.
Fractal Audio: Axe-Fx II product and support pagesThe XL and XL+ hold 768 presets and 1024 cabs; the original and Mark II hold 384 and 100.
Fractal Audio: Axe-Fx II product and support pages