There is nothing wrong with the color of your sensors. Do you have a problem?

Yes, the door does not close.

Does the main light flash 10 times when you try to close the door? Does the door move at all? Are there any sounds? Look at the LED on the back of the motor unit near where all those white wires go and see if it is flashing a code. It will flash a number of times, then pause then repeat.

The only way to close the garage door is to hold the control in the garage until it closes. The remote control from the car opens the garage door but it can not close the garage door. To close it you have to use the control button and hold it until it closes. Looking at the LED at the motor yellow light will blink 4 times and repeat it self. What do you think is the problem? Your reply will greatly be appreciated. Thanks.

Your door sensors are either misaligned or have quit working. Check to see if the small light on each one is lit and not flickering. Tweak them a little. If you can't get both lights to come on you have bad sensors.

Both door sensors are lighted. One is green light and the other is yellow. Both light does not flicker. What do I have to do. Change the sensor with yellow light?

No don't change the sensors. The color of the light doesn't matter. Check for 5vdc between terminals 2 and 3 on the rear of the motor unit. If there is no voltage or if it is greater than 6vdc the logic board is bad.