If not there may be internal damage.
How to fix a wall clock that runs slow.
The bob will settle lower making the effective length of the pendulum longer.
Again you should also check the electric clocks handles.
To speed up the clock tighten the nut turn it toward your right.
If so replace the cables with new ones and see if it works or not.
This screw regulates the speed of the clock.
Gently take off the compartment and take a look at the connections.
Use the fingers of your dominant hand to gently turn the regulation screw.
If your clock is running slow then there might be an issue with the wiring.
Swing the pendulum on the inside of the clock if it has a pendulum.
It is possible to install the battery upside down where the battery is.
To slow down the clock loosen the adjustment nut turn it toward your left.
The clock will run slower.
Turning the screw to the left will lower the pendulum slightly and slow down the clock.
Open the door and bring the pendulum all the way to the side then let.
How to repair an old wall clock if your wall clock is off you will definitely replace the new battery if it remains dead.
If they are getting a collision or there is unnecessary friction among them smoothen out the edges of the handles with a piece of cloth.
You should hear a ticking sound.
Wind the clock if it has stopped running.
Do you see any damage to the wires.