eurovox 2008 resetting

Hi , have a 2008 eurovox , that works fine for a about a minute then the picture will break and it resets itself , does this about three times and then just locks , it will only go back on by taking the power out..ive reflashed and its the same , i've reset it , opened it and pressed the reset button . I think its a faulty component but don't know where to look any ideas ...