Channels load but screen is just black

[Shappy]

Not sure why but BuzzTV loads but when the channels come on the screen is black with no sound?  Do I have a setting issue?

[dishuser]

does the service work with other iptv apps?

[Emporium]

Are you sure it is not your service ?

As of last night, one service which used to be very popular, just went black on anyone still using it with apps like BuzzTV (and many others), will no longer work.  They decided to go a completely new approach, using a custom app, and your credits do NOT transfer over

They changed a number of URLs since last October when they first had issues, and yesterday (Friday the 13th) was the last straw as far as I know. 

So make sure it is not your service.   

MAC, XC API or M3U type of server login ?