Worse, removing the RAM or GPU then powering up should cause a pattern of beeps... but it doesn't.
Under most circumstances, I'd say the motherboard or the CPU is dead. Maybe even both. More often, it's the motherboard.
But with this particular board, let's not be hasty.
|AX78 rear panel (EZ CMOS switch highlighted in red)|
Just give the switch a push to the opposite side and see if that helps. I know it did in my case.