Sry, warranty's invalid now man cause it's not in its original configuration. Most warranties don't even let you tamper with anything. Main example is HD's, if you break the sticker seal warranty's gone. Like that.
Anywho, if the other psu diddn't cause the error? he probably has a crappy PSU in there right now. Use that enermax whisper one then. There's lots of crappy PSU's out there, if it's not a good brand you have in your comp? then you're taking a risk. In his case the risk failed him. In my case I'm lucking out.