Dixie narco problems vending

Ok so i got this coke machine off ebay.  Cools nice lights all work.  Its gota be from the 80`s.  I have a problem.  No matter what coins i put into it, it goes striaght to the coin return.  The little red screen thing doent light at all even when there is no soda in the machine. Shouldnt it say out of stock?  The only thing i can get the screen to do is display use correct change and thats when i hit the lever inside where u load the cans.  I am new to this and have no experience. Any light you can shed upon me would be grreatly appreciated.

[vend_dr]

Do you have any cans in the machine when you are trying coins? If there are no cans in the columns the coin mech will be disabled and not accept coins.

Some models of dixie will not say out of stock until you push the selection button.