Hiya M8y,
PSU replacement are a son of a b1tch to get for the A3K. If you have a good spare ATX kicking around, go here for the mods needed to get it to work.
LinkyIt will at least let you take the PSU out of the equation if nothing else & some carefull "Butchery" will let you get the original PSU back as it was. :-D
Best of luck m8. :-)