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Won't charge battery, sometimes powers off when battery installed

Hello! I've got a 15" 2GHZ Core Duo aluminum Pro that works 100% perfectly on AC power if there is not a a battery installed. When a battery is installed, the computer often dies suddenly in the middle of the boot process, although with some batteries it doesn't do this. I've tried several known-good ACs and batteries, so I know those aren't the issue. Removing and installing batteries when the computer is on also seems to make it cut off occasionally. The computer is not charging batteries either. I'll get the lightning bolt indicating it's charging, but it will eventually turn to an X. The light on the DC-in shows amber, so it's as if it thinks it's charging, although it isn't. It also won't run off of battery power with the AC disconnected. Again, the laptop works 100% fine when a battery isn't installed.

Normally I'd say it's the DC-in/sound board, but due to suspicious factors (power cutting when a battery is installed while on) I'm wondering if it might be something else, maybe a short or a connection issue? This machine was working fine for weeks, and the customer just returned it with this issue.

I took a look inside, and there's nothing obvious. The internal battery connector is secure and looks fine. Any ideas? I just have a hunch that it's not the DC-in, although maybe I'm just in denial that I need to spend $50 and replace it. :-)

Also, and not to overly complicate this, but one of the two little "posts" inside the battery compartment that the battery is supposed to lock into is broken off, however I don't think this is the issue, as the battery is still secure, and the behavior still persists when I make sure to hold the battery firmly in place, etc.


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Hello RDK. This sounds pretty peculiar, but I would venture to say theres a short between the battery connection and the Logicboard. It's the only possible explanation if the machine works fine in DC Power and seems to replicate the issue with known good batteries. I work on Fire Alarm systems, and it's not directly related to computers, but I can tell you that most odd behavior in circuits is caused by reversed polarity or shorts. Try replacing that connector and cabling. If that does not help, then you might have to face the fact that a DC board replacement is in your near future. ;o)

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Thanks Majesty! I'll try replacing the connector.


No prob. RDK, Hope u get this resolved.


Sorry for forgetting to accept this earlier! I ended up replacing both the battery connector and the lower casing of the laptop at the same time (since one of the clasps holding the battery in was broken), and after that the problem disappeared. Thanks again!


Glad you got it resolved RDK!!


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rdklinc sera éternellement reconnaissant.
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