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SOURCE: COmpaq Presario V5000 Battery will not hold charge
Problem with the motherboard connector that charge the battery.
SOURCE: hp compaq nx7400 - battery died and power cord will not turn comp
If your system won't boot up with just the AC adapter connected, it means to say that there's a problem with the AC adapter or the motherboard of the computer. Basically, if the AC adapter or the motherboard is damaged, you won't get a charged battery. If there's another AC adapter that you can try your computer with then that will be great. If antoher AC adapter works, then you just have the AC adapter replaced. If a known AC adapter didn't work then you may need to consider replacing the motherboard of the computer.
SOURCE: Hp compaq nc6320 doesnt charge
I have had a similar problem and solved by another solution. I think you should try it before grabbing a soldering iron.
In my case my charger was not working from one day to another. So I bought a universal charger of Kingston. Worked without any problem for a long time ~6 months. Then same problem again. Checked voltage of the charger and that was okay. Strange thing with a charger of a friend, my laptop charged again! So I thought I needed to buy another one.
Still it was strange that two chargers broke in such short time and at the same time still have voltage around 19V and charging other laptops! So I checked a forum and there I found the follwoing solution (uninstall the AC adapter and reinstall it again in the device manager):
- go to control panel
- system
- device manager
- batteries
- uninstall the programm for the AC adapter
- go back to control panel
- check for new hardware and install the AC adapter software again
Problem solved! Even my old adapter works again!
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