Repair broken PSU on a PM G5 modell 11.2

Hi!

Have a broken power supply (PSU) on a 2 GHz dual core PM G 5 Late 2005 modell 11.2. Have anyone tried to repair it instead of replacing it? Any experience with this is of interest. What can be done inside the PSU, any component to repair or shift. I have opened the PSU and had a look at the capasitors, none of them are broken or has expanded. Is there a story to tell about repairing the PSU I´m glad to hear about it.