http://www.newsweek.com/sling-down-not-working-no-signal-error-code-online-server-login-account-1297481

Popular TV streaming service Sling was down and not working for users across American on Friday. Sling has been down since around 10:41 a.m. EST, according to outage tracking website Down Detector. 

The site's outage map says the reports of Sling being down widespread.