. . . Also, note that most motherboards will not start if the CPU is not detected. (Just throwing that out there.)
Also, I want to note. I have checked and checked again my APU, Mobo, and Ram. Unless I am missing something, or, misunderstanding component compatibility, everything should be compatible. ASRock AB350 Pro4, GSkill FLARE X 2400 2x8gb, and AMD A8-9600 APU.