2140 Views 5 Replies Latest reply: Apr 11, 2011 4:34 AM by mberardinelli
Try resetting the SMC:
Resetting the SMC on portables with a battery you should not remove on your own
Note: Portable computers that have a battery you should not remove on your own include MacBook Pro (Early 2009) and later, all models of MacBook Air, and MacBook (Late 2009).
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.
Note: The LED on the MagSafe power adapter may change states or temporarily turn off when you reset the SMC.
Usually the black screen coupled with the sleep light staying on is indicative (yet not always) of improperly installed RAM, try re-settling the RAM in their dependent slots, and see where it gets you. Course, it may also mean your logic board,cpu and or screen may have taken the plunge as well.
Id definitely go ahead and do the PRAM reset. hold the 'commandoption+PR' buttons upon powering on your macbook (where you would usually hear the chime)
Alternately, If that fails to achieve any results try the following: Remove power supply unit & battery, hold power button down for AT LEAST 10 SECONDS then hook up the battery and pmu and boot the system holding the above keys (commandoption+PR)
If all fails Id contact apple so you can at least get an idea on what exactly is wrong and what your best options are thereafter.
Re-seating the RAM could help, as that does also cause this problem. However, I feel it is a power issue due to the fact that the machine was working fine until it was used to the point of the completely dead battery. Unless the laptop got super hot while in use and super cold after the battery died causing some major chip creep, I don't know that the RAM would have come unseated.