Make sure it's not loaded. Look inside at the firing pin for part of a copper shell casing smashed/wedged over the recessed hole there. When that happens the pin will not be able to contact the end of the new load shot to fire, just a click. Hope that does it, they are pretty durable.
If any ads are present in my answer above, I do not condone/support/use the product or services listed, they are there against my permission.
The Following User Says Thank You to Gary in WA For This Useful Post: