I have laptop HP Pavillion zv5240us, it's running XP sp2

While still under warranty through Best Buy, the charger, the battery and the plug where the charger goes into the computer were replaced. The replacement charger and battery were generic.

Now that it's not under warranty, I thought the charger was messed up again; so I stopped USING the laptop for a couple of months, there was only about 15% charge when I stopped using it and it was stored w/ the battery still inside.

Last week I just ordered new OEM battery and charger through eBay.

The charger got delivered before the battery did so I tried out the new charger.
I plugged it in and turned on the laptop, it turned on but then died out right after logging in. After trying again and the same thing occurring I realized that the battery was only charging when the laptop was turned off, then when I turned it on, there would be no simultaneous charge or use of the charger, so it ran on whatever little bit left on the battery before turning off again.

I also noticed that WHENEVER the battery was charging instead of the charge light being CONTINUOUSLY on like it always was in the past, it was instead flashing and every time it flashed there would be a zapping/buzz sound coming from the battery. So I stopped trying to charge.

Today the new battery got here.
I plugged it in and let it charge for about 40 mins [there was no buzzing/zapping sounds and the light lit up continuously] then turned on the laptop while still plugged in. Again, once I turned it on, the charge light went off so it stopped charging and ran only on battery. Then I got a message saying that his was the wrong kind of battery for the laptop and could cause the system to under perform and I should remove it, there was no "Ok" or "Cancel" or any other choice; so I just turned it off and removed the battery. The battery LOOKS identical to the one I first got when I got the laptop and it fits properly.

Then I have put back the previous generic battery and it seems to be charging w/out flashing and buzzing at times. After I let it charge about 1hr, I decided to turn on the laptop only to find that there battery indicator says there's only 9% charge but in less than a minute it dropped to 7%. I just set it to hibernate.

The plug is kind of loose right now but if you place the charger where it doesn't move it's fine so I don't REALLY think it's that and that had happened in the past and I was able to get by w/ just setting the charge cable in the right position and not moving it.

I don't know what to do w/ the laptop. I thought it was a faulty charger and replaced it but that doesn't seem to work. I'm sorry for the long entry but I just wanted to be detailed. Any ideas or help is greatly appreciated. Let me know if you need any more information or pictures of the battery/charger.

Thanks!I.M.H.O. Ive considered your problem and it seems to me that all your problems have originated from the incidence of the replacement of the battery charger and the connection at the computer casing.
From what you have described in your entry, the problem is within your computer.

My best guess would be that the computer, from manufacture had a problem with the charge/power circuitry that remained undetected at the time of the replacement of the charger port. Id say that the battery replacement and port access module were not at fault, but a result of the problem within.
The additional problems all remain after the fact and are a result of the original undetected problem within the confines of the circuits of the computer.
A dry solder joint, a loose connection at the casing a blown diode or transistor within the original manufacture of the product, any number of possibilities exist. Electronic Zapping sounds while charging dont usually occur to a product that is made to intricate specifications

I would go so far as to say that you should get all your data from the hard drive and dig up your original receipt of purchase and enter into negotiations with the supplier for a replacement of the unit. Most countries have consumer protection for faulty product purchases. Perhaps you could get HP to investigate your problem and offer a solution.
In approaching HP however I would not be overly zealous in telling them you purchased anything but Original equipment from a recognized certified supplier.Id have to go to with what Imnoguru said...my moms laptop had the same situation and my father opened it up and found out that the connector for the laptop had a cold solder joint, my dad just re solder it and it worked just fine! so my best bet would be to re solder that connector.