Hi I've just been given an rma to return a 2 year old psu for repair or replacement, that's been problematic for sum time and nows died completly .I've replaced it with a temporary one and all's working fine,does the cables need to be returned as they are still being used in the case or can it be tested without. Also is it best to send this through royal mail..just wondering what the process is as I've never rma'd before