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Just replaced the charger with a new one and charged the battery. The onboard battery tester indicator lights all light up. But, pressing the power button gets no response at all. Can I get some kind of schematic to do some troubleshooting? Or perhaps there is a common failure of this sort? I’m a retired electrical engineer so I should be able to do it.
Have you tried a pram reset? You can achieve this by trying the following: Resetting PRAM Shut down the computer.Press the power button.Before the grey screen appears, press the Command, Option, P, and R keys at the same time.Hold the keys until your computer restarts and you hear the startup sound a second time.Release the keys. Let me know how you go.
