If you do not hear any boot chime, hold the keys, waiting about 2 minutes before you give up. Keep holding those same 4 keys, until you hear the boot chime 2 more times. Hold those 4 keys - you should hear a boot chime Press and release the power button, then immediately hold Option+Command+p+r NVRAM reset: (you need to have power (magsafe connected, or a working battery) for this reset to work:
You do not need a working battery or any power connected to do an SMC reset. SMC reset: Hold Control+Option+Shift, then press and release the power button. If you can't get your MBPro to power on with the battery in - or out, then I would suspect that you not only have a bad battery, you also may have a bad DC-in board (that's where the MagSafe connector is located) The magsafe LED flashing multiple time usually means that the battery is bad (not accepting a charge)ĭo the battery test LEDs on the side of your MBPro light up when you press the test button?ĭo you get a green light on the MagSafe connector when you plug that in? If replacing the magsafe board does not fix, then it's a logic board.Ĭlick to expand.Which MBPro do you have? Probably a FAILED MAGSAFE BOARD, as there's no battery to test when its not installed. Do the battery test lights blink 5 times again? Connect the magsafe connector.Īgain, let it sit plugged in for a minute or two. If all lights flash 5 times after pressing the battery test button, the battery is bad. If the LED appears a normal green (but never goes orange), then the battery is not charging. Let that sit connected (with the LED on green) for 10 minutes or so, then try the power button. The connector LED should light up immediately. Then, unplug the adapter from power, wait about 10 minutes, then plug back in. Make sure the battery is installed, and the battery connection is secure. What color is the LED when you attach the connector? You did not say anything about the LED on the magsafe connector!
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