Sorry mate i know this is a little late.
But, have you tried updating the box??
Unpower the box by removing the power lead.. Hold the backup button and keep it held then plug the power lead back in... hold the backup button until either... all the lights on the box facia are lit up.. or until it displays "software updating" on the tv screen.
I had a Grundig box which did the same after i updated it fixed the box.. in fact i still use the same box now when im testing dishes
