First time user: Can't complete first setup

I just bought a Roku today. Never used one before. I didn't get very far, and now I'm stuck with a useless product. I connected the device to my TV through the HDMI port and connected it to a power source. The screen responded immediately and gave me instructions to pair the remote. That part went fine.

The next step was to connect it to my Wi-Fi network. The screen showed me available networks, including my own. I went searching for my Wi-Fi password, and when I came back, my TV screen no longer showed the networks. Instead, it showed a blank screen with "No Video" warning. And now nothing I do will return me to the startup screen or even show me that the Roku is still alive. The Roku remote no longer works, the Roku device is no longer recognized by my TV, either. It just went dead.

I've tried turning off the TV, unplugging and replugging the Roku from the HDMI port, changing the input selections back and forth with my TV's remote, and changing the batteries in the Roku remote. NOTHING WORKS. The whole product is completely dead before I could ever finish setting it up. All because I took too long to enter my Wi-Fi password. 

You should warn customers that if they pause "too long" during the setup process (such as walking into another room to find their Wi-Fi password), the entire Roku product will self-destruct and become completely unusable. The hardware device won't be recognized by your TV, the remote control will go dead, and there is no way to revive them. And there's no tech support, besides this forum? Awful.