Looks like an over voltage issue to me... burn out looks very similar but i wouldnt expect to see it as uniform as this... normally one or two segments will burn bright then die.. not all burn bright as you have.

Check inputs for possible shorts, burn out resistor etc

Thanks for that Retropin, will check it tomorrow arvo.
Maybe the pic isn't real good, the brightest bits are actually about normal, other parts are not as bright as normal, if that makes sense.
Cheers,