Hp 530 notebook will not charge

sounds like the battery memory (lithium) is nearly out and wont read. you may need to purchase a new battery, or try draining out the current battery to where it shuts itself off, then charge it, but dont use the computer while it is charging. Using the computer while charging doesnt give the battery full charge for it's being drained at the same time your charging it causing the memory for power storage to be less.

Try starting the laptop with no battery inside and only the power adapter connected. If it does not start , then you have a faulty dc adapter, or the socket on motherboard has a broken soder joint.

If the laptop starts with DC adapter, then usually you have a faulty battery. There are a couple of other faults on battery charger circuit, but they are quite uncommon.