You need to elaborate more on "is not turning on."
Assuming "AAP" refers to an "ASIAIR Pro," even with no microSD card plugged in, you should see the red PWR LED light up once the power switch is turned on.
Without a microSD card, the green LED light (labeled CARD) will also flash in a cadence (Raspberry Pi looking for firmware to boot from).
If you do no see either a solid red LED (or the flashing green LED if there is no microSD card) when the power rocker switch is pressed down towards "1", you are not properly suppling power to the ASIAIR.
Check to make sure that the axial power plug that you are using is a 5.5mm/2.1mm plug instead of a 5.5mm/2.5mm plug.