First off I would like to say that I am brand new to all of this and this is my first machine I am looking to fix. I picked up a 1970 Chicago coin big flipper for cheap money. The guy who sold it to me knew nothing about it. Taking a quick glance while I was buying it I noticed that several fuses were blown so I was hoping that was the fix. I called up Steve at the pinball resource and he had the most impossible fuses to find. I put them in and it turned it on and everything lit up. I thought I was good to go. I then put a quarter in to get a credit and a fuse blew. I replaced the fuse and now as soon as you turn on the machine the same fuse blows. Its a 15 amp fuse. Should a be using a slow blow or fast blow? Is it the plug where it might not be grounded as a two prong? Any thoughts?