Chosen Solution
Since a few days my long-serving MBP 15" (Early 2011) won’t power up. It was running and it was put to sleep by closing the lid. After that (about an hour later) it didn’t come back to life.The MagSafe adapter lights green, not orange as it should when the battery is charging.The battery indicator on the side of the device shows 6 (out of 8) green LEDs when MagSafe is connected. Otherwise it won’t light up at all, which might hint at the battery.After reading various posts about similar problems I decided to switch the DC board, to no avail. According to other posts and my experience with other MacBooks (and other notebooks) it should be possible to start up without the battery. I tried this to rule out a battery problem. Are there any other problems that I might check before thinking about switching the logic board? The latter seems like a pretty heavy investment on a 6 year old computer.
SMC reset - yes. the computer should boot up while the battery is unplugged. Unplug battery and power adapter, hold down the power button for 60 secs, then plug in the power adapter only. Hit the power button again and see what happens. Logic board failure is extremely common with 2011 15" MBPs - see last paragraph here: https://www.apple.com/support/macbookpro… Have you noticed anything else weird with it? Any display issues like discoloration, lines across screen, or mosaic patterns?
