I have this MBP 15" mid 2010 laptop. When connecting power, the light on the magsafe is green, even though it's been in a drawer for a year. Pressing the power button get no reaction at all. Not even the sleep light. I yanked the battery and tried without, and with a known good (and charged) battery, same result. I'm assuming it's a bad system board. Is there anything else it could be?
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Reset the SMC
Unplug the MagSafe or USB-C power adapter from your computer.
Using the built-in keyboard, press Shift-Control-Option on the left side of the keyboard, then press the power button at the same time. Hold these keys and the power button for 10 seconds.
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Here's the Apple TN: Reset the System Management Controller (SMC) on your Mac
I tried all of the key combos to no avail. It is unusual to see a machine go completely dead like this.
Was it water damaged?
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