Google Nexus Q hard reset
Manual factory data reset media-streaming entertainment device
You can also factory reset your Nexus Q without using your phone or tablet:
1. Unplug the Nexus Q, then plug it in again.
2. As soon as the ring LED lights up, place your palm over the single LED on top.
The ring LED starts flashing red. Keep your palm in place until the ring LED starts to display a rotating blue spot (about 10 seconds).
If you lift your finger too soon, the LED turns solid red. If this happens, unplug and plug in the Nexus Q again to start over.
During a successful reset, the ring LED pulses purple to indicate that it's wiping all data. Once the reset is complete, the Nexus Q starts up
again, displaying a rotating blue spot. After a short time, it displays a solid color to indicate it's ready to be set up again.