|I haven't had a lot of experience with laptops, but I have replaced the battery with a generic one, two different brands, for two friend's latops, HP and Compaq, and they had no problems with the generic one, at least not within two years or so since replacing them. |
Since it sounds like the battery is charging okay, you may have a problem with the probably separate power board inside the laptop, going by what I've seen of the insides of a few laptops, or the board may have developed a poor connection.
Have you, or is it possible someone else who has had physical access the the laptop
- dropped it, or otherwise subjected it to a physical jolt ?
- spilled liquid on it, or exposed it to liquid such as rain, or sprayed it with liquid ?
Has there been a power failure event that happened while the AC adapter was plugged in since it last worked fine on the battery alone ?
Those things are the most frequent reasons something inside the laptop has been damaged or loosened.
Laptop no video (or video problems), and battery, AC adapter, power jack T shooting.
See response 1:
Tips about battery charging problems on Dell laptops - may apply to other makes.
See response 3 in this by iTech:
From what I've seen, the power board is usually the same board the power jack is connected to.
The problem is caused by a poor connection of the power board.
HP probably has a Maintenance manual for your laptop series you can examine.