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Battery doesn't charge ("Not Charging" followed by "No Battery")

Hi Everyone.

I've got a question about a 1.5 GHz PowerBook G4 (A1095) that won't charge its battery.

Immediately after the computer is booted, the battery is recognized, but is listed as "Not Charging". A few minutes later, it disappears, and the status changes to "No Battery".

At first, I thought that the (rather old) battery had finally died. However, when we swapped in a new battery, it had exactly the same problem as the original battery, indicating that something is probably wrong with the computer itself. I've tried resetting the PMU, as well as booting off of a different disk, so it's unlikely to be a software issue.

I could see this being either a logic board problem or a DC board problem, and I was wondering if anyone had a guess as to which one it might be (or if the problem might be something else). A quick visual inspection inside the machine didn't yield any obvious information (e.g., visibly failed components).

If it helps to narrow it down at all, both the logic board and the DC board have small preexisting problems. The logic board has the all-too-common dead memory slot, and the power socket is slightly loose (i.e., the AC adapter sometimes requires a bit of fiddling to yield an illuminated LED, thus providing an excellent illustration as to why MagSafe was a good idea).

Thanks very much.

Cheers,

Jonathan

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Hi mayer.

Thanks very much for the suggestion. I took the laptop apart and removed the battery connector to take a closer look at it. Both ends of the connector pass a visual inspection, as does a light pull test on all of the wires. In addition, I checked the continuity between the pins (on the battery side) and the plug (on the logic board side), and all of them seemed fine.

However, that doesn't rule out an intermittent short or broken connection (e.g., one that only manifests once the connection has been heated a bit). It also doesn't fully rule out a pin that is slightly bent and failing to make a solid connection with the battery.

Do you think that it still makes sense to try and swap the connector?

Thanks again.

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I would replace the battery connector cable: G4 Aluminum 15" 1/1.25/1.33/1.5 GHz Battery Connector

UPDATE

Given that we don't have any other place to go (or symptoms I don't know about?) It's the logical and cheapest fix to try. See if you can tighten the screws on the DC-IN port. If it's the outer ring on the plug in jack that has spread, wrap some wire (like muli-strand cord wire) around it and slowly tighten the wire by twisting to close to spread.

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It appears iFixit don't want to tell us how. They didn't even have the part listed with the teardown.

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Use the hard drive replacement guide to get to it: PowerBook G4 Aluminum 15" 1-1.5 GHz Hard Drive Replacement

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research +

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