Original power supply was dead.
About an hour.
Wow, this replacement was awesome. I've been working with electronic equipment for 30 years and this was one of the smoothest replacements I've ever done. The part from Ifixit was beautifully packed and the part appeared to be OEM. Thankfully the Mac is a great design so it made the project all that much easier. I took my time to make sure I was careful with a couple of the more delicate connectors. It works GREAT! Thank you Ifixit!