Used tested working transformer/ power supply for vendo soda vending machines. If your machine isn’t getting power this could be the problem. Use your meter & test to make sure you got power coming in before this & after. If you have power coming into the unit but not leaving the unit then this will fix your problem. Not certain of what models this will work for pretty sure it came off a 511 we parted out. It has vendo part number on it so call the factory & make sure.