Help. AR300M-Lite no lights

I just bought a new AR300M-Lite. I plugged it in and successfully connected with wifi. Everything working fine.
After unplugging it, the next day, nothing works.
I don’t have any of the three lights. I tried pressing reset for 10 seconds. Nothing happens.
It looks like nothing is on. But, it gets warm, and also the usb cable is warm when I unplug it. So it is using electricity.
What should I do to reset it?

If no Led light up then I think it should be defective. You can just return it.