You have posted far too little information. You need to help others to help you.
You have not stated what model your Humax is, or even said whether it is Freeview or Freesat.
You have not stated what you mean by ‘goes off’. 'Goes off' could be interpreted in a number of different ways. 'Goes off' could mean that the Humax switches itself off and then on again, or 'goes off' could mean that you lose the picture for 30 seconds on the TV but the Humax is not rebooting.
If you are losing the picture then you need to state why you think that it is the Humax losing the picture and not the TV deciding to lose it, or a switcher placed between the TV and the Humax deciding to lose it. Neither have you stated how the Humax is connected to your TV.
Neither have you stated what you have tried so far e.g. if you have tried it with another TV e.g. if you have tried using a different method of connecting the Humax to the TV (e.g. Scart lead instead of HDMI lead or by direct connection instead of having a switcher in-between).
NS, October 2012
