No led lights to diagnose power problem.

Hi, I have none of the four led lights showing up to indicate what may be the problem? I thought it may have been a faulty power inlet plug, but that seems fine. I have checked the logic board with no apparent sign of burnt components I have removed and connected all cable connectors in the unit and have swapped ram and still no luck. The removal of the psu showed signs of bubbled looking cracks in the tracks on the board? could this be the problem with these tracks not making contact? would this problem show no power what so ever to get a led reading to diagnose? Im not sure if the leds are effected by this as I thought the 1st led off was to show power faulty, would this carry over and effect the remaining leds as a sign of a power fault.

Thanks guys.