I have the strangest issue going on with my laptop. To begin wit, it is a Dell Latitude D620 that we bought used but in perfect working order. About a year after we bought it I was using it and it just stopped working...it turned out that the adapter was dead. Now at the time I figured that the adapter had probably broken some time before and had not been charging the battery for a while but we just didn't notice and the computer dying was just the charge leaving. I do recall getting a low battery message at the time and plugging in the adapter and it not helping. So we bought a new adapter and everything seemed to be okay but maybe not...the adapter isn't the tightest of fits and so sometimes it falls out. when that happens, the computer dies. I never really thought about that but that should not be occurring so I decided to look into it. The battery appears to be fine. The little test thing on the battery itself shows all lights when I push the button. The little icon in the tray shows a 98% charge, Quickset shows the same and days that the battery is working properly. However something is obviously not right because it turns off when the cord comes unplugged and will not turn on unless plugged in. The setting is correctly set to work off battery so I'm guessing there is something wrong with the computer itself...perhaps seriously wrong. Any ideas?