Why won't my laptop run off my AC adapter?

Episode 1370 (1:34:17)

Dana from Georgia

Dana is vision impaired and he's excited that Windows new Holographic edition will have a talking installer. Ctrl + Windows + Enter will enable the narrator.

He also has an Acer computer with 500GB hard drive. After ejecting the hard drive, the computer shut down and wouldn't turn back on. Why didn't it work with the AC adapter? Leo says that if he has a bad battery, most laptops won't work even if it is plugged in. It may be part of a power conditioning system.