My daughters's Dell Latitude e5250 is unable to charge through the DC jack. When the adapter is plugged in (standard Dell 65W charger), the laptop runs, but it will not charge the battery.
When I put the laptop into a docking station, the battery charges normally. This works with both the laptop's 65W adapter and the docking station's 130W adapter.
At this point I thought it might be the DC Jack itself, so I purchased a replacement. This made no difference - the battery would not charge with the new jack. The DC jack is complicated to replace on this laptop, but fortunately it can be unplugged from the bottom and the replacement can be tested without fully removing the original.
I also tried plugging the 130W adapter into the DC jack with no improvement.
At this point I am stuck. The battery can be charged, just not through the DC jack, only through the docking station. This is very inconvenient.