Yup. Power suppy has failed.
Nope, you can't replace it with one from a PeeCee.
A [url=http://sunsolve.sun.com/handbook_pub/Systems/U60/U60.html]Sun Ultra-60 Workstation[/url] is NOT a PeeCee.
If this is a personal system, and not one with coverage
under a service contract, then go get a used replacement.
Try an online auction web site, such as Ebay.
It may actually be advisable to get a complete U-60 on Ebay
instead of just a solitary power supply.
I just took a quick peek at Ebay...power supplies for $20.
complete systems for $100.
How many spare parts would be available from a complete replacement?
You decide.