Every time you power up the Access Point it is going to go through the boot up process and check the memory and the other functions. The only way to not have the AP go through the systems check is to do what you have done and hit the "ESC" key.
I will be mounting this AP-350 on a conference room and I will not be able to go in it and attach a console cable everytime.
Pluse users reguraly disconnect the ethernet cable going from the monument to the AP-350 and plug it on their LAPTOPS (the power supply for the AP-350 is located in the closed, from the closed I run a cable to the moument in the Conference room, where I connect my AP-350). Thank you