Did you try a hard SMC reset yet? Carefully disconnect the battery and with nothing else connected press and hold the power button for a good 15sec this will allow the logic board to fully discharge. Now, plug in the MagSafe charger alone, the system should spontaneously startup. Did it? Let the system fully boot up and do a clean shutdown. Reconnect the battery and restart did it start up this time? If not that aims me to a bad SMC sensor.
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If the system never restarted the I would pop the logic board out and do a detailed inspection looking for burnt or discolored components. Focus in on the chips and tantalum capacitors as they are the most likely.
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If the system never restarted, I would pop the logic board out and do a detailed inspection looking for burnt or discolored components. Focus in on the chips and tantalum capacitors as they are the most likely.
The SMC chip is not the most likely to fail, it’s the inputs that it depends on are the more suspect. Which is why we did the hard SMC reset.
Did you try a hard SMC reset yet? Carefully disconnect the battery and with nothing else connected press and hold the power button for a good 15sec this will allow the logic board to fully discharge. Now, plug in the MagSafe charger alone, the system should spontaneously startup. Did it? Let the system fully boot up and do a clean shutdown. Reconnect the battery and restart did it start up this time? If not that aims me to a bad SMC sensor.
If the system never restarted the I would pop the logic board out and do a detailed inspection looking for burnt or discolored components. Focus in on the chips and tantalum capacitors as they are the most likely.
The SMC chip is not the most likely to fail, it’s the inputs that it depends on are the more suspect. Which is why we did the hard SMC reset.