I have a Honda Accord '03 sedan. Recently the lock on the driver's side doesn't unlock anymore. I can't use the key to automatically open the car or once inside I can't unlock the car with the button. All the other locks work just only the one on the driver's side does not. Another thing is if I manually use my key to open the door or manually raise the lock up from inside then I can't unlock any doors at all,

Thoughts:

. Any time you have an electrical problem, begin by testing all under dash and under hood fuses with a test light or multimeter.

. Sometimes, spraying the switches and automatic locking mechanism with WD-40, and cleaning with a rag, will solve the problem.

. Make sure the battery in the FOB is good.

. Replace the driver's automatic lock.

I asked someone and they told me it could be the actuator problem and I just need to replace it. Do you think that could be it?

That's what I meant by automatic lock. Again, try cleaning it and the connector first with WD-40 and a rag.