How to Reset an EFI Chip (8 Steps)

Shut down the computer.
Turn on the computer and immediately hold down the 'Command,' 'Option,' 'P' and 'R' keys at the same time.
Release the keys after you hear the computer beep a second time.
Check to see if the computer is operating properly. If not, continue through the next steps.
Reboot the computer and hold down the 'Command,' 'Option,' 'O' and 'F' keys at the same time during startup.
Wait until you see the message 'To continue booting, type 'mac-boot' and press return.' If the message does not appear, try starting the computer by holding down the power button continuously until the message appears.
Type 'reset-nvram' and press 'Return.'
Type 'reset-all' and press 'Return.'
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How to Find Out What Is Damaged If I Dropped My MacBook Pro

Open the MacBook Pro. Inspect the screen for cracks, chips or other damage. Verify that the computer opens smoothly and closes securely.
Select the 'Apple' menu and then 'Restart' to restart the computer. Damage to the internal hard drive isn't always evident until the next reboot, so it's important that you perform this troubleshooting step. If the MacBook Pro doesn't power on at all, plug it in to ensure that it has an adequate power supply.
Open iTunes and play any song to rule out damage to the MacBook's audio card and audio output. Optionally, plug a headphone set into the computer's headphone jack to make sure the jack has not been damaged.
Connect to a Wi-Fi network using AirPort. Open Safari and navigate to a website to make sure the Internet adapter still works. Navigate to a video website such as YouTube or Vimeo and confirm that the video card functions properly and you are able to play a video.
Launch a chat program such as Skype or iChat and begin a video chat with a friend. If you see your own image in the corner of the screen, it means your webcam is still functioning.
Monitor how quickly your battery power drains when the MacBook Pro isn't plugged in to ascertain whether battery damage has occurred. If the battery drains significantly faster than it did before, the battery is damaged.
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