2014 MacBook does not boot; 2 chimes
Reset NVRAM or PRAM on your Mac

Settings that can be stored in NVRAM include sound volume, display resolution, startup disk selection, time zone, and recent kernel panic information. The settings stored in NVRAM depend on your Mac and the devices that you're using with your Mac.

Shut down your Mac, then turn it on and immediately press and hold these four keys together: Option, Command, P, and R. You can release the keys after about 20 seconds, during which your Mac might appear to restart.

I also would suggest you try SMC Reset if the above solution doesn't help. 

Reset the SMC on Mac

First, shut down your Mac and Press Shift-Control-Option on the left side of the built-in keyboard, then press the power button at the same time. Hold these keys and the power button for 10 seconds. Release all keys. And, Press the power button again to turn on your Mac.

What the SMC does

The SMC is responsible for these and other low-level functions on Intel-based Mac computers:


Responding to presses of the power button
Responding to the display lid opening and closing on Mac notebooks


For more reason, you can check https://support.apple.com/en-us/HT201295