ZX5000 HP

Whenever I get a laptop I check the ac adapter with a volt meter. If it shows proper voltage I try to wiggle the adapter when it's plugged to see if I can make the laptop power on or charge. Doing this over a long period of time can damage the laptop but necessary for proper diagnostics. I always like to see the laptop power on before I begin.
The hp zx5000 is the same as the Compaq R3000 and ZV5000. The adapter showed proper voltage but I couldn't wiggle it to get it to charge and it had no battery life.
I striped the laptop down to gain access to the jack and noticed it had been epoxied on with a black substance. Some of the circuitry was covered by this epoxy like substance. I could see some burn marks on some of the other circuitry around the jack area. In that case it's not even worth trying to replace.
Never, never try to use an epoxy like substance to sturdy the jack. You can ruin the board and any possibility of repair. A good solder job will properly hold the jack in place.