I would say, yes they are recoverable.  Power supplies with 60 amp rail is at the least minimum.  I would get a power supply tester and test both.  Go over all your circuits with a volt meter and be sure you are getting power where it should be, check for any shorts. 

If you can not find the issue, If you are in the states, you have the option of shipping it too me and I will test, service and repair it for you and return for a very reasonable rate or in exchange for mining time.  I am open to different options.

Mtnminer