Adjusting time on a sterling noble regulator pendulum wall clock no buttons on back and cannot get cover off clock to get to hands

To set the time on a Sterling and Noble chiming clock, please follow these steps:

Remove the clock from the wall or mantle and place it on a flat surface.
Locate the clock's time adjustment knob. This is usually located on the back of the clock and may be labeled "Time," "Adjust," or "Set."
Turn the knob clockwise or counterclockwise to set the correct time. Be sure to move the hands of the clock in the direction of the correct time.
If your clock has a chime feature, locate the chime adjustment knob. This may also be located on the back of the clock and may be labeled "Chime," "Strike," or "Silent."
Turn the chime adjustment knob to the "Silent" position if you do not want the clock to chime. If you want the clock to chime, turn the knob to the desired chime setting.
Once you have set the time and chime settings, replace the clock on the wall or mantle.
Note: It is important to set the time accurately and synchronize it with an accurate time source, such as an atomic clock, to ensure that the clock keeps accurate time. Additionally, it is recommended to consult the clock's user manual for specific instructions and troubleshooting tips.

To change the time on a Sterling & Noble wall clock that does not have any dials on the back, you will need to follow these steps:

1. Locate the small, round hole on the back of the clock. This is the reset button.
2. Using a small object, such as a paperclip or a toothpick, press and hold the reset button for about 5 seconds. This will reset the clock and allow you to set the time.
3. Release the reset button, and the minute hand will begin to move around the clock face. Use the reset button to advance the minute hand to the correct time.
4. Once the minute hand is set to the correct time, the hour hand will begin to move around the clock face. Use the reset button to advance the hour hand to the correct time.
5. Once the hour hand is set to the correct time, the clock will begin to run normally.

I hope this helps! If you have any further questions, don't hesitate to ask.

Difficult to know without seeing it or having a make and model. If it is digital, it will be buttons, if analogue, a small dial/knob on the back as part of the battery housing. If the hands are not covered you can move the minute hand back one full turn.

Check out the videos. They are all similar.

https://www.google.com/search?q=How+to+tighten+the+hands+of+a+28+inch+Sterling+%26+Noble+wall+clock

..

Try a watch maker/jeweller.

studs r on 16" centers (usually).
hanger needs to be secure in a stud and sized for clock weight.
hanger arrangement depends on clock config
plan on removing clock from wall to replace batteries.

You may need to try to repair or replace the quartz movement, this link will help you out.

http://usedclockparts.com/14-clocks/clock-videos/126-quartz-battery-operated-clock-movement-repair

Clock may either need to be decked out from the wall at the top, or pushed all the way up against the wall. These clocks have inexpensive quartz movements that aren't of the highest quality. If the clock is more than a few years old, it may be that the electromagnet that impulses the pendulum back and forth has just expired. You might try Clockit.com, or maybe Timesavers.com to find a replacement movement. Hope this helps, Good Luck

Good details! Go to Timesavers.com
You can find a replacement pendulum unit there. Your pendulum mechanism probably has a bad coil. The coil is extremely difficult to repair.