Channel 76 can hear the channel but have no picture why

Television Seven Network
1

Hi can anyone help I am unable to see the new channel 76 I can hear the channel but have no picture why

2

You’ll find some useful information here Why can’t I receive the new TV channels? – A Guide to 9HD, 9Life, 7flix, TEN HD, WIN HD, 7HD, ABC HD, SBS HD and Viceland HD