Coinco s75-9800b

Can some one help me? My coin mech will not accept coins, returns every one. It worked once after plugging it in and loading the machine. Now nothing.

Has anyone had the same problem before?

I want to trouble shoot it before purchasing a new one.
If it needs replacing what coin mech should I use?

Wondering if this Choice Vend 168 is a blessing or a burden.

ok, just finished cleaning the coinco mech. found an old beat up wheat penny lodged in the mech. No telling how long it has been there. Plus 2 quarters on the ledge of the door. Atleast I made 51 cents out of the clean up. Glad to have it working now.