My laptop power supply has been shorting. I’m hoping it is in the cord. This morning I ordered a new one off eBay, Twenty-four dollars, including shipping included. That’s not too bad, if it works. It is the wrong model number, but it has the right voltage, amperage, and polarity. I can fit a different plug if that is wrong. I don’t know for sure that I need a power cord for my laptop, but if I wait until I am sure, it will be too late. Besides, a second would be nice. I could leave it at my desk.