Super Box picture & sound breaking up

Morning guy's have a Box3 in the UK which has V8 firmware, the problem is the sound and picture constantly break up.
Any ideas.
Cheers

 

check for a bad coaxial cable first,and is scart in tight?

 

Have done that, also forgot to say that the problem is there in 3 different houses.

 

If its happening in 3 houses in your estate, then more than likely its a cable co. problem in your area.

 

noely, i can plug the box 3 in and i grt the sound and picture problem, as soon as i plug my own box in "the box" its fine so i cant see it being a cc fault.
Starting to think its knackered.

 

Try a factory reset & flash it with the 6.01 & see if this helps.

 

Will do, thanks

 

Still the same problem noely, it fine for about 10 seconds after switching on after the flash, then the sound and pic problems come back.