I purchased a power pack from the local computer repair shop on Saturday. Same day it blew, so I contacted them monday morning when they told me to bring it back for testing. Its easier to explaine this way: Pc man: Im not replacing it, it could be your electric, ive never had a problem with them. (starts to test it) Me: Oh right Pc man: You could have a spike in your electric, do you se a surge protector. Me: No (tested, not working) Pc man: Do you have your invoice? Me: ?? You gave me the power pack with no bag, I dont remember an invoice. Pc man: It was an A4 printed piece of paper with your name on. I cant get a refund off the supplier without it. Me: I dont remember but ill go home and check the coat I was wearing anyway. Now should HE have a copy of this invoice? Where do I stand without it, its obvious where it came from.