I recently bought a Pi with the intention of running Pi MusicBox on it. I have no screen and no keyboard, so I checked whether it would be possible to operate the Pi headlessly. I found out that Pi MusicBox should support a number of USB WiFi adapters, so I bought an Edimax USB WiFi adapter.
I put the Pi MusicBox image onto an SD Card, adjusted the WiFi settings in the config file, plugged in the WiFi adapter and powered the Pi with a 1A power supply. The power led went on and the ACT led flickered from time to time (I guess it flickers when the SD card is accessed). But the WiFi adapter status led never turned on and the Pi never connected to my WLAN. So I tried booting it without the WiFi adapter, but with an Ethernet cable plugged in. When I powered the Pi on, the Ethernet leds stayed dark.
I then tried the same thing using the official Raspian Wheezy image, but had the same result: the Pi is not showing up in the network and the Ethernet leds stay dark.
How should I go on debugging this? Should I try reading boot messages using a serial cable? Or is my Pi just defect? I have an ungood feeling because of the dark ethernet leds...
When should the Ethernet leds turn on during booting? As soon as a cable is connected and the Pi is powered? Or only as soon as the network is fully functional?
Thanks for any hints!