This is from Google's website
If you purchased your Chromecast from Google Play or an authorized Chromecast retailer and are in need of a replacement, please contact us for assistance.
Please note:
- We can only replace your defective Chromecast with a replacement Chromecast that is authorized for sale/use in the same country where you originally purchased your Chromecast and the replacement Chromecast must be shipped to an address in that same country.
- For example, if you purchased your Chromecast in the United States, we can only replace your device with one authorized for sale/use in the United States, and we can only ship that replacement to an address in the United States.
