Ac adapter powerbook g4 battery6/22/2023 ![]() I tried to test the tip and the ring but also got no reading. The pin in the center looks like it's a tip,ring,sleeve type of connector. I tried testing with the probes on the outside sleeve and the tip of the pin but I get no reading. It has the barrel style connector with the outside sleeve and a pin on the inside that looks like a male headphone jack.ĭoes anyone know what is the positive and what is the negative? The problem is I can't figure out how to test it. I wanted to make sure that the adapter I bought was providing the 24v that it should. It doesn't charge the battery and I can't power on the powerbook. When I plugged it into the G4 nothing happens. ![]() I bought a cheap replacement one on Amazon. I have an old G4 powerbook with a dead battery but it doesn't have an ac adapter.
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