I have a Dell Latitude 600 laptop and the powercord is getting a little long in the tooth. The jacket on it is getting frayed near where it plugs into the computer. About 50% of the time I boot it up I get a screen that says something to the effect that the computer doesn't recognize the power source "press F1 to continue". The computer runs fine after I press F1. I assume this has to do with the power cord being chewed up. I look online and see all kinds of available powercords. Most of them are so inexpensive that I'm suspicious of them. Reviews range from "Great, I bought six more." to "Worked once, then smoke came out." Is there a good source for what I'm looking for? Is there any particular brand that is well respected? I'm concerned not only about computer performance, but safety. Since it will no doubt be plugged in all the time, with nobody home, I worry about fire with a junk cord. Thanks for any input.