hp ze4400

This laptop is very similar to the ZE5xxx series and compaq 2200, 2100, and 2500 series that have this same issue.
It came in with a very loose jack and melted ac adapter tip. I powered it on with the battery to make sure it wasn't dead.
These laptops are fairly easy to get apart and the 2500/5xxx series are a little bit harder. Once torn down the jack area was a little burnt and the jack itself was barely even on the board. I probably could have just pulled it off without even desoldering it. The jack came off with no problem and the resolder job went on without a hitch. The laptop was put back together but got no charge light. This is connected via ribbon cable which also controls the touchpad. Simply reseating it did the trick and the light/touchpad worked again. If the cable isn't seated just right things won't work.