In some cases the drivers door lock solenoid acts as a master to the others so any others in the sytem that are faulty may put an extra load on it.
I suggest you checked the passenger door one first.
To remove the inner door card you will need to do the following
1. Remove the screws along the bottom edge.
2. Remove a small plastic plug in the recesss for the inner door handle - this will reveal another screw - remove it.
3. If electric windows are fitted remove the window switch which will reveal a nylon plug which holds the door card to the door itself. The plug can be eased out using a broad bladed screw-driver
4. The card is held by pop-on clips which can be popped of usig a broad blade.
5. There is usually a mastic type sealant which can be separated using a blunt knife - I find a wallaper scraper slipped in betwen the card and door to be ideal.
6. Once the panel is released you may have to undo speaker cables, etc at the back and the panel needs to be moved upwards as it is hooked over the edage at the glass.
7. You should also find a polythene sheet covering the aperatures remove carefully and try not to make any tears as this acts as a waterproof shield. Should it tear you can repair with duct tape.
Removing the front door panel is similar but you also need to remove the clip-on plastic cover at the door mirror first.
As it says in the good old Haynes manual assembly is the reverse of the above and whilst you are in there it pays to give the window regulator cables and pulleys a shot of spray grease