My uncle has a 97 Accord LX Sedan (4 cylinder) with keyless entry and power doors. There seems to be a problem with the door locks. Whenever you press the switch to lock the doors (or even when you use to remote to lock the doors), there is a buzzing sounds from the driver's side door. The sound is almost like there is a buzzer that is making it. It only occurs when the door actually locks. If the door is open and you try to lock it, the lock will not go down and it does not make the sound. I have yet to try and push the lock down by hand and see if it still makes the sound. When you try to unlock the door, there is no problem. I'm not really sure what is the problem but I think it has something to do with the actuator for the lock.

 

Bump

 

Door lock actuator.