The Model 190 is not one of the easiest to clean.
I would start by looking for a user's manual (with take down instructions). Take a good look at the bolt and see if (by somebody dry firing it) the firing pin is hanging up.
Then a thorough cleaning and inspection of parts.
"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
Life Member NRA
Life Member NAHC
Former President of the ECPT (Eifel Combat Pistol Team)