Instruct: Classify Amazon reviews into positive or negative sentiment
Query: DOESN'T WORK!!!!

We bought two of the beamer tv video phones, one for ourselves and one for our family out of country. When I set it up it came on for about one minute, and then just went to a black screen saying no input. I reconnected everything repeatedly and went over the manual. Then I tried the other beamer tv for our family and it didn't work at all. Just a black screen. I've tried to contact Vialta and they havn't gotten back to me. The customer service phone number in the owners manual is disconnected and the website to register your product is unavailable. DO NOT BUY THIS PRODUCT!