Power of Connect Wi-ME

Hello,
Regarding power of the Connect Wi-ME, you have any rule or limitation? Because it doesn’t boot up, no light both LED on the connect Wi-ME(Yellow and green) when it is powered on within about 500ms after powered off. But, when it’s powered on after 500ms when powered off, it boot up correctly. Is it needed the time for Connect Wi-ME after power offing once?