My HP pavilion ze4949 will not charge the battery. I got this laptop 2nd hand, and the "charging" light that the manual states should be lit while the AC adapter is plugged in has never lit; I've purchased 3 different replacement batteries, and in each instance the battery worked in the laptop for a couple of hours running on the factory charge, but as soon as I plug in the AC adapter, the batteriy will begin discharging and lose even the factory charge within an hour or so, and won't charge in the laptop. I want to know how to check the board to see if there's a problem there, and if so, could I get instructions on how to repair it?

Mym7 stops charging the battery every now and then to allow the battery to discharge. This extends the life of the battery and changes the state of the battery light.

Replace Battery.

POWER SUPPLY & BATTERY PROBLEM
If the laptop battery is more than 3 - 4 years old then the battery could be worn out. Rechargeable batteries have a finite number of charge and discharge cycles and will lose their charge capacity over time, i.e. won't charge to 100% and gradually the charge reduces until the battery won't charge up at all. OR The battery shows a 100% charge but when the adapter is disconnected the battery drops off to zero capacity in a very short time. If the battery drops to an unacceptable charge level then the battery needs to be replaced. Rechargeable batteries will fail if stored in a discharged state for long periods. When you connect the power adapter into the laptop, does the power LED light up? If not then - The battery adapter or the adapter's power lead or the laptop's power socket could be faulty. Check power adapter's DC plug that connects into the laptop power socket with a multi-meter, the voltage should be slightly higher than the voltage that is printed on the label on the bottom of the adapter. If the voltage is zero or way below the voltage that is printed on the label then the power adapter is faulty and needs to be replaced. If the adapter is OK then connect it to the laptop and power it up, then look at the power/battery charging LED light and wriggle the power plug in the laptop's power socket. If the power/battery LED light flashes and in a certain position this LED light stays firm, then the power socket is either faulty or it has a dry solder joint where it is connected to the motherboard. This can be repaired but it requires the laptop to be completely dismantled to get at this power socket and repair. If you cannot DIY then I suggest you get a quote first.

From the link you gave its seen that its comparatively lower than the other series.. Brand: HP Laptop BatteryBattery Info: Li-ion, 4400 mAh, 11.10V, Black, 310.00(g), 205.15 x 59.20 x 37.50 mm Rating:
Capacity Voltage Price($) 4400 mAh 11.10V C $ 57.79
8800 mAh 11.10V C $ 79.69
Availability: In stock
Notes for charging Hp Pavilion dv1000 Series battery :

1. You must fully drain the Hp Pavilion dv1000 Series battery until the laptop goes into hibernation for your first use it.
2. Store it in a cool and dry area. Do not expose battery to water or other moist/ wet substances.
3. Do not forget to take away your Hp pavilion dv1000 battery from the laptop if you will not use it for a long time.
4. Know that after that plug in your charger and allow it charge for 12 hours or depending on what the technician has told you. 12 hours is the max and you can use it while charging .
5. Charge new Hp Pavilion dv1000 Series battery for three times at first. After that it will take less than 2 hours to fully charge your Hp Pavilion dv1000 Series battery.
6. It is normal for HP laptop battery to become warm during charging and discharging.
7. Learn that this is recommended so that the Hp Pavilion dv1000 Series will heat up for the time allowing ions to reawaken.

Laptop batteries will usually last from 1.5 to 5 hours, depending upon the demand, the battery and the use. Sound burns up a lot of juice as does the DVD player so if you're watching movies or playing games an hour is about right. You can purchase a better HP PAVILION DV9000 Battery with 12 cell , it will work longger.
detail: http://www.battery-center.net/hp-pavilion-dv9000-battery.html

You need a new system board unfortunately.

Dear musmoh19
1st unplug your battery if is conected to the wall,
2nd then take the battery out
3rd plug in to the laptop then to the wall

I use it that way but not for to long because it gets hot but I also put a small fun under it but still can be fry.
these the only solution I have am sorry. vicky
any subgestion or help will be apreciated
vicky4home@hotmail.com

The battery needs replaced. After all, it is a battery and batteries eventually wear out.

Battery led is blinking, this usually means your battery is faulty. Try replacing the battery with a new or tested second hand one.

Hope this helps

cheers