Re: cisco AP 1120B config.text deleted, no built-in console
I found the answer already. Press Mode button while connecting power, till the status LED (the middle LED in the three LEDs) becomes amber, then release the button. Wait a while till the AP is initiated, then you can access it by IP 10.0.0.1 with user: Cisco password: Cisco.
Information for those who are meeting the same problem as I.