Hello,
I just picked up an original Dragon's Lair machine.
It powers up fine (one speaker is out), but it will not take a credit.
It just plays the intro movie & then just keeping showing every level.
The LD player is not original, but as far as I know the rest all is.

The person I bought it from said he had the previous owner set it up so you don't have to put quarters in.
The score board reads "2 credits" at start up & that stays on.

Is there some sort of hard reset I could do?

Anyone have any clues to what the problem is?  

Thanks in advance!
Robb