Camera or phone works only in one USB port on MacBook Pro

Fix it by reseting the System Management Controller (SMC), follow the instructions below to restore the power to the port:

1. Shut down the computer.
2. Connect the MagSafe power adapter (powered) to the computer.
3. On the built-in keyboard, press Shift-Control-Option keys on the left side and the power button at the same time.
4. Release all the keys and power button at the same time.
5. Press the power button to turn on the computer.

There seems to be nothing happening when reseting the SMC, the LED on the MagSafe may change states or turn off temporarily.