Buick Pak Ave Ultra -- Door locks not operating

The door locks used to open except the drivers side. Now none open whether by the remote control or by pressing 'unlock' from the door. I hear a very weak
noise of some relay and nothing more. Have to use key to open driver door and then manually unlock other doors from inside.
Few years ago the actuator on passenger side was replaced. Any thoughts to amend the locks problem will be appreciated. Thanks.
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ab

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