HDMI On My Vu Uno Has Stopped Working..

[MR B]

Hi, My vu uno just stopped sending a signal to my tv today, It works fine with a scart lead but not with a hdmi cable, I have reflashed the box with older images with vix,Black-hole, VTI etc with no joy, Tryed the bootloader aswell, Tryed new cables, Tryed different tv`s. But when box is first booted it shows the vu screen so this proves the hdmi is working untill it starts to boot the image when all goes blank, Is this a hardware issue our has anyone got a fix?