Almost new battery won´t charge, does not work on AC

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Powerbook G4-15''-1.67GHz-A1138 modell

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Guenther Roppele @guentherroppele

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发帖于: 2011年5月29日

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Almost new battery won´t charge, does not work on AC

After spending a few days in Taiwan (110V) the battery of my PB G4, A1138 won´t charge any more. Power connector lights amber. After coming back to Austria, i connected the PB for 2 days and it would charge again and worked proper. Now, 2 months later, the battery again refuses to charge, coconut battery & system profiler say that there is no AC power connector & battery is not charging. It won´t power up with AC connected. I did the PMU reset and PRAM reset - no effect. The battery is an original Apple replacement and has only 40 loading cycles. i´ve measured the voltage at the battery connector in the battery slot (3V & 6V depending on the pins), so the charger provides voltage. Can anybody tell if the DC-in board is faulty or if it´s the logic board?

I´m thankfull for any advice!

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Richdave @richdave 声誉积分: 32千 102 61 76 · Answer 1 · 2011-05-29T06:28:16-07:00

Richdave @richdave

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Measure the Output of the AC adapter. It may have failed or the cable is damaged so the battery will not charge. Even a flat battery will give a voltage reading with a Hi impedance load like a voltmeter. The battery voltage will likely drop significantly when you put a load on e.g. power up the laptop.

You could also try measuring the voltages on the wires on the logic board that come from the DC in board as the DC in board or it's cable may be faulty.

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BTW are you using a 45 or 65W AC adapter? The manual states that the 45W will wok but may not supply sufficient power all the time causing the battery to be drained when the laptop is under load.

由 Richdave 完成的 2011年5月29日

Thanks for your fast response. Maybe I did not express myself clearly: i did not measure the battery, but pluged the AC adapter (65W btw) took out the battery and measured the voltage at the battery connector in the slot. I´ll measure the voltage at at the logic board as soon as i disassembled the laptop. Tomorrow i should get a good AC adapter from a friend - i´ll test that first. Do you know, where the fuse in the AC adapter is located? There should be one, but i can´t find it.

由 Guenther Roppele 完成的 2011年5月29日

I thought the AC adapter was a sealed unit

由 Richdave 完成的 2011年5月29日

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