well, the BEST solution would be to get a new Atomic supply and be done with it and save money on the monthly electrical bill as well.
but, you are going to need to find a good repair person who knows power supplies to work on it. There is a lot of smoke that can be let out of that box and it can cost you a lot of money if that happens. It is not the easiest thing to work on, but it can be repaired and returned to service for many more years.
Now, where are you and do you need a reference?
Alan