Spiderbox HD7000 Glitching TV hd

hello, For some reason my trusty old box has decided to Glitch on ITV HD channels. Only ITV, BBC hd fine. I have 2 boxes into a Samsung 40 1 year old screen. The Amstrad Sky box Freeview is Fine on HD. Seperate dishes so I swapped the inputs, still the same so not the dish/wireing. The screen works fine with the Amstrad HD box. So I surely is my 7000 in need of something.
Any thoughts welcome.

Delete the transponder, then re add it and rescan.

hi manic01, thanks for input. just tried this and no luck also switched off between re-enter. 11052, 11068, 11097. I have done a factory reset earlier. If they were all scrambled then maybe other issues but freeview only.

If you have a dect phone try turning that off.

Tried unplugging this from wall but no better although I googled your suggestion and learned quite a bit. I have Ethernet cable into this box from router. At this minute 11502 is much better than the others and watchable. Almost like frame dropping or a short freeze.

This needs a bit more looking into. Maybe a caps/power problem or maybe interference of some sort as suggested above. Odd only ITV HD. I can still get ITV HD on the Amstrad so no real prob. thanks.