Try this 1. Shut down the computer.
2. Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
3. On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
4. Release all the keys and the power button at the same time.
5. Press the power button to turn on the computer.
The twist is in step 4. I held the keys in step 3. for about 5 seconds, then released all EXCEPT the power button, holding this for an additional 5 seconds before releasing it. Finally, step 5. The computer booted with a normal screen, which I hadn't seen in 2 months, BUT, the fans were going full blast, no led on the MagSafe, no battery in the menu bar, Mac not going to sleep when closing the top, and probably other stuff that I missed.
I rebooted several times from the menu, without problem and with a normal screen, but still with the fans blasting and all
Finally, I shut down and did a NORMAL SMC reset, the Apple standard way, and lo and behold a normal startup, normal screen, fans, MagSafe, everything! Credit to https://discussions.apple.com/people/Charles Houghton-Webb
2. Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
3. On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
4. Release all the keys and the power button at the same time.
5. Press the power button to turn on the computer.
The twist is in step 4. I held the keys in step 3. for about 5 seconds, then released all EXCEPT the power button, holding this for an additional 5 seconds before releasing it. Finally, step 5. The computer booted with a normal screen, which I hadn't seen in 2 months, BUT, the fans were going full blast, no led on the MagSafe, no battery in the menu bar, Mac not going to sleep when closing the top, and probably other stuff that I missed.
I rebooted several times from the menu, without problem and with a normal screen, but still with the fans blasting and all
Finally, I shut down and did a NORMAL SMC reset, the Apple standard way, and lo and behold a normal startup, normal screen, fans, MagSafe, everything! Credit to https://discussions.apple.com/people/Charles Houghton-Webb
