Freeview picture wobble

[ja5on]

For some reason the picture on my Digifusion FRT101 has started to wobble from side to side, only very slightly, more apparent when the EPG is displayed and for the life of me I don't know why.
I've tried changing the scart lead, swapping it to another scart input on my tv and nothing seems to make a difference

Any ideas what might be causing this? Electrical interference maybe?

Its connected to my Hyundai A321 via an RGB scart, selected as RGB via the menu etc etc
I've tried other things in the same scart input to check its not the tv and they don't wobble

is it about to go fizz pop?

[SamRadford]

Maybe failing capacitors? Have you made it overheat?

[ja5on]

no, its very well ventilated and not stacked or near any other av equipment