If your Macbook Pro or MacBook Air is giving you hard time with issues like :

• The battery is not charging.
• The cooling fan has suddenly started making non-stop loud noise and it won’t go no matter how many times you restart the system.
• MacBook get frequently hanged and you lost all your work.

There is a simple fix to all these problems. You just need to reset your PRAM and SMC.

Before you go further, it is highly recommended to take back-ups of your important files and photos.

How to reset the PRAM?

1. Shut down your MacBook by pressing power button for longer period. 
2. Once your system is completely shut down. Press the Power button.
3. Then, Press Command Option P R at the same time and keep holding these keys until the grey screen appears.
4. After sometime, you will hear the Macbook’s Start-up sound. You can now release the keys, and let your MacBook do the rest of the work.
5. You are done.

How to reset the SMC of your MacBook Pro or MacBook Air?

1. Shut down your MacBook by pressing power button for longer period.
2. Keep the power cord of your MacBook plugged in.
3. Press Shift-Option-Control Power Button at the same time and then let go
   
4. Now, turn your MacBook on.