I have a 2.5-year-old notebook computer, and the cord on the power supply recently went from what looked like perfectly good to frayed and short-circuited in about a second flat. Bzzzt! and a little puff of smoke, and the next thing I know, I’ve got not only a fire hazard, but a notebook computer that wants some power and can’t get any.
A replacement power supply from the manufacturer of my notebook computer was going to cost me $80 plus tax and shipping, so I started Googling for a better price. I found one on some weird web site that was used and refurbished for about half that price, but I had no idea how good the quality would be (although it said it had a 90-day warranty). I kept searching and searching, and eventually I found a blog entry that referred to a FREE replacement program from the manufacturer, because apparently they were quietly acknowleging that there was a design flaw.
I made a request through the manufacturer’s web site, but they don’t ship them out, their customers have to go to a retail store to pick one up. I went in yesterday after work, and the store employee told me that the replacement program was not automatically FREE, that the store employees were making case-by-case judgments to determine which power supplies were damaged due to customer misuse, and which seemed to be broken due to manufacturing defects.
When I took my damaged power supply out of my backpack and handed it to the store employee, he noted right away that the way I had correctly wrapped the cord around the cordwrap built in to the power brick. I am always careful not to put too much strain on the ends of any kind of wire, because when a wire is bent tightly like that, it can wear out the insulation, crack the conductors inside, or both. And then it’s not a good wire anymore.
Because he could tell I was taking proper care of my power supply wire, he determined that I was eligible for the free replacement power supply. So, my advice to you, if you have the same problem with your wire, is to make sure you wrap it properly before you present it to the store employee. If I had had to buy the part in the store last night, it would have cost me $61 (still a bargain compared to the $80+ online, but who wants to pay $61 when free is a possibility?).