DELL LAPTOP WILL NOT CHARGE BATTERY

DELL LAPTOP - INSPIRON 6000 - NO CHARGE. I have been an Electronic Technician for 30 years, but have never got very deep into repairing computers beside assembly changing and re-configuring. I have the laptop mentioned. It was given to me. I have tried several batteries and none of them charge. I tried three different Dell power supplies and the bios setup does recognize all three different power supplies by their wattage. I tried 65 watt, 90 watt and 180 watt supplies. The bios setup screen shows the batteries at 5-10% charged. I did notice that the power supply jack was loose. I had to remove the motherboard to get to it, but was able to see FOUR solder joints that were wiggling in the hole. I resoldered the loose connections. After reassembly, to my surprise, nothing had changed. Please note that until parts arrive this laptop has NO hard disk drive in it. I do not think the HD is needed to charge the battery. I am under the impression that battery level and charging is handled exclusively by the motherboard and firmware and does not care about an HD. Is this correct? Other than replacing the motherboard which I would not do, is there anything I might check to restore charging capability of this laptop? There is every possibility that I am missing something that would be obvious to someone that repairs laptops daily.
Need-a-ClueRESEARCHERAsked:
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JohnBusiness Consultant (Owner)Commented:
I did notice that the power supply jack was loose. I had to remove the motherboard to get to it, but was able to see FOUR solder joints that were wiggling in the hole.

Can you check the voltage at the jack points?  You need to be able to assemble the machine enough so that you can start it.

If you are confident of your solder repair (and I do assume you are) and since you have tried multiple batteries and multiple AC adapters, then it is most likely the motherboard has a fault.

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rindiCommented:
There is no need for an HD to charge a battery. actually it should charge while the laptop is off, and in that state there is no way for the laptop to know of any missing parts like an HD.

There should be a charging circuit in the laptop (this is probably integrated on the mainboard, but it can also be a separate daughter-board on some laptops. It sounds like that circuit has gone bad...
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Need-a-ClueRESEARCHERAuthor Commented:
It was plugged in for 3 hours and the charge percentage did not change. Came in this morning and it is at 100%. Anyway, it appears that the resoldering did do the job but I just did not give it the many hours it needed to charge. Thanks!!
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JohnBusiness Consultant (Owner)Commented:
@Need-a-Clue - Thanks for the update and I was happy to help you. I have re-soldered ThinkPad jacks to do the same thing.

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