Have you got the latest version of Ipnosys (0.37) or Underworld installed, maybe the timers expired on older version (if thats what you are using)
[or did CAM overheat]
Quick check of a few channels:
TF1 HD 12207V
ARTE HD 12168V
FRANCE2 HD 12168V
FRANCE3 Paris 12699V
FRANCE4 12522V
M6 HD 12168V
FRANCE Ô 12522V
FRANCE2 11895V
M6 11895V
W9 11895V
TMC 11934V
all ok here so I'd say TNT Sat still ok with Diablo Light v2 Rev4.0/Ipnosys0.37