The power supplies like you showed on the picture have an issue. Please check this post: Notice of Option to Replace Power Supply Unit. The power supplies with part number Phihong PSC 12R-050 can be free replaced. In the notice there is a link to FAQ for this kind of situations with this particular power supply. You will find in there another link to a form that you need fill out in order to get your replacement. Here is the link to the form: Form.
Please check the information in the notice and let us know if you have more questions about it. Have a nice day!